v. 6.0 Update List
is a list of changes or of problems which
were fixed in each EZNEC
update. Each update also contains all the changes listed below it. For
example, 6.0.3 contains all the items listed for 6.0.3, 6.0.2, and
6.0.1 (the first revision). Updates for all EZNEC
program types are shown.
In Currents display, the end connection text would run into the magnitude data
when wire numbers of single segment wires exceeded 99. This bug was introduced in
v. 6.0.25 where connections to both ends of single segment wires were first shown.
Enabled Near Field analysis with MININEC-type ground.
Results from near H field analysis could be significantly in error when Real,
High Accuracy ground was specified. This occurred only with NEC-2 calculating
engines and not with EZNEC Pro/4 when using NEC-4.
The reported "Total" Near Field could be incorrect, with the error greatest
when all components are equal in amplitude and not in phase. The error was
negligible when one component dominated or components were approximately in
phase. Note that this is now the correct RMS value of the total field which is not
necessarily the peak value divided by the square root of two.
The Near Field Setup data entry order has been rotated 90 degrees to make the
layout more consistent with other data entry dialogs.
When doing Near Field sweep with spherical coordinates, number of steps would be
incorrect and azimuth wouldn't be stepped if the stop angle was less than the
start angle and the step size was negative. Similar problems would occur in some
other cases when the angle convention was compass bearing.
Connections to both ends of single segment wires are now shown in the Currents display.
Made a minor correction to the manual.
This version contained several bugs, one of which would cause a crash when the
Undo feature was used. All known bugs were corrected in the v. 6.0.25 update.
I apologize to those few people who downloaded an update or the demo program
during the few hours this version was available.
Defective data were stored in .PF3 (3D trace) files, resulting in bare axes
when viewing in TraceView, if 3D trace file was saved when the 3D window
Highlight choice was Azimuth. Problem would also occur if saving was done
after Azimuth choice was turned off, unless Elevation was selected
afterward and before the plot was saved.
Improved smoothness of Wire Information window operation.
When the Angle Convention was changed in the Options Menu, the numerical value
would stay the same; for example, if the compass bearing of the cursor was 30
degrees, the conventional (CCW from +X axis) angle would be 30 degrees after
changing the angle convention. This resulted in the cursor or 3D elevation
slice changing position. Now, the numerical value is changed so that
the cursor position in a 2D plot and selected 3D elevation slice stay
the same when changing the convention.
When elevation slices derived from a recalled 3D trace file were shown on a 2D
plot, the indicated slice angle in the list at upper left didn't change when
the angle convention changed.
When the primary trace and added traces are displayed in a TraceView 2D plot,
the primary trace is now identified in the list at the upper left by the file
name, like the other traces, rather than as "Primary". This change wasn't made
when not in TraceView because the primary trace isn't necessarily associated
with any file.
Made a number of minor changes, additions, and corrections to the manual.
When printing a plot to a PDF file (a printer choice in Windows 10), file
selection window would continually re-open when Cancel was clicked. When
printing text to a PDF file, an invalid error message would appear.
View Antenna wire operations (Add Conn Wires, Move Wire Ends) didn't work
when Special Option WireInfoDist was set to -1 to make the Wire Info popup
display open with <Ctrl>-right-click instead of hovering cursor.
Windows would always open on the primary monitor of multiple monitor
systems, even if positioned on other than the primary monitor when last
On some multiple-monitor systems the Wire Info popup would not appear if
the View Antenna window was positioned on other than the primary monitor of
In the Wires Window, program would crash with Error 9 if the small button
at the left of the add row (the empty row at the bottom of the grid) was
right-clicked after a value was added to one of the columns of the add row
and before the row was finalized.
Made additions and minor corrections to the manual.
[EZNEC Pro only]: Modified wire grid creation form to select
text in boxes when they get focus or are double-clicked, like other
Increased the number of wire grid wires which can be created from 20,000
to 45,000. The total number of segments in a model is still limited to
45,000 for calculation.
When starting TraceView mode, displayed wire loss stayed the same as before
TraceView was started, rather than showing the value in the opened trace file.
[EZNEC Pro only]: When displaying Far Field data in comma delimited
format in locations where the decimal delimiter is a comma(,) some phase
angles incorrectly were shown as zero.
Improved detection and reporting of folder and file access errors, particularly
ones caused in Windows 10 by Controlled Folder Access.
In v. 6.0.15 - 17, an Error 5 (Invalid Procedure Call) crash would occur when used
in locations where the decimal delimiter is a comma(,) when attempting to save an
IONCAP/VOACAP file, and sometimes when showing data in comma delimited format. This
revision has no effect when the program is used in locations such as the U.S. where
a decimal point(.) is used as the decimal delimiter.
If a small (less than about 1/1000 of a segment length) change was made to a the
coordinates of a wire end connected to other wires, the change was immediately reversed
by EZNEC's automatic coordinate matching feature unless the changed
wire was the lowest numbered one in the connected group. The changed coordinates are
now applied to all connected wires regardless of the number of the changed wire,
provided that Preserve Connections is off.
Numerous minor corrections were made to the manual.
[EZNEC Pro only]: NEC format files can now be opened by dragging and
dropping onto EZWPro.exe or by including on the command line.
[EZNEC Pro only]: When reading NEC format files, some LD 5 (wire
loss) "cards" weren't translated correctly. In particular, an LD 5 "card" representing
wire loss included in a file saved by EZNEC Pro wasn't incorporated in
the model at all.
Various system permission and other restrictions would cause crashes (usually Error 75
or 76) on startup. Also, Windows 10 was recently updated to allow the user to turn on a feature
(Controlled Folder Access) which would cause these crashes by preventing EZNEC from
writing into the Documents folder. The program now traps those errors and shows an error message
explaining the problem rather than crashing. If the problem was caused by Controlled Folder
Access in Windows 10, the user has the option of opening a web page which has instructions for
preventing the problem.
In regions where the decimal delimiter is a comma (e.g., 6-1/2 is written '6,5'), an error message
would appear preventing entering wire insulation thickness in any of the Custom value sets in the
Wire Insulation Characteristics dialog. There is no change in program operation when used
in the U.S. or other regions where the decimal delimiter is a period (e.g., 6-1/2 is written
Program would crash (Error 401) if display polarization was changed between circular and linear in Desc
Options when the FF Table window was open.
Reduced the time taken to format some numbers for display. This will be most apparent when viewing tabular
3D far field results with small step size. Note that some displayed results might differ from previous
versions by one least significant digit due to changes in rounding routines.
Program would crash (Error 9) when Load Dat was clicked if model included a parallel-connected load with
impedance magnitude less than 1E-10 ohms placed on a virtual segment.
New topic "Plus Octane Fill Up" added to the Test Drive chapter of the manual. It gives step by step
instructions for creating a wire grid and other structures using EZNEC+ and shows how
to use several EZNEC+/EZNEC Pro features.
Made some minor corrections and enhancements to the manual.
In EZNEC-generated Touchstone (.s1p) files, the last field of the first non-comment line
of the header was changed from 50 (or alternate Z0 if set with Special Option S1PZ0) to 1 when the parameter
type is set to Z (via Special Option S1PParamType). Unlike s-parameter values, impedance values are not
normalized, so the appropriate field value is 1 rather than Z0 when tabulating impedances.
[EZNEC Pro only]: Program would crash with Error 5 when calculations were run on a machine
having a 64 bit operating system and less than 2GB of reported total RAM.
In v. 6.0.7 - 6.0.11, when a phase angle was exactly 180 degrees, program would show zero degrees instead.
When segments at both ends of an insertion object were different lengths than the object's segment, no warning was given.
When Add Connecting Wires was selected in the View Antenna display, sometimes the New Wires Dia box caption
didn't show the correct units (although the value in the box was interpreted as being in the correct units).
Resolution of the Stepped Diameter Correction (SDC) calculation has been improved so program now makes smoother SWR curves
when SDC is being applied. This will result in slightly different results than before for models where SDC is used.
This change does not apply to EZNEC Pro/4 when using an NEC-4 calculating engine because SDC is not needed
or used with NEC-4 engines.
There are no operational differences between v. 6.0.10 and 6.0.11 for non-Pro program types.
[EZNEC Pro only]: Program would crash (Error 9) after reading an NEC format
description file containing a GN "card" with first parameter 3 (NEC-4.2 Sommerfeld ground).
[EZNEC Pro only]: When installing EZNEC Pro on a 64 bit system in
some dual boot installations having also a 32 bit system, 64 bit calculating engines wouldn't
be installed. This resulted in error messages at program startup and inability of the program
When a 2D trace created as
a "slice" of a 3D plot is saved, an incorrect Plot Angle (elevation angle of an azimuth plot or
azimuth angle of an elevation plot) was saved in the file. The only effect is that the
incorrect Plot Angle value will be shown in the main program window if the trace is opened in
Trace View mode, and in the 2D data portion of the 2D Plot Window if the trace is added to a 2D
display; none of the other trace values or characteristics are affected. Unfortunately there is
no way to correct files saved with previous program versions and they will continue to show the
incorrect values when opened.
[EZNEC+, EZNEC Pro only]: Specifying a color for the text (numbers) had no effect
when done in the Smith Chart display. Note that color changes were and are common among all
SWR display types -- for example, changing a color while viewing the Return Loss graph will
also change the colors of the SWR, Reflection Coefficient, and Smith Chart graphs.
Insertion object placement
test was being done only on end one of single segment wires containing an insertion object.
Changed color of insertion object placement warnings from red (warning) to orange (caution).
If the Wires Window was extended to show more wires and a wire was added at the bottom, the grid
and window would snap back to the default height.
Printing a 2D plot would make the right hand column of data in the data box disappear from the
screen display although it was printed.
Fixed bug that would very occasionally cause a "Type Mismatch" error message to appear only very
briefly then prematurely ending the calculation.
Made minor revisions and corrections to the manual.
[EZNEC Pro only]: Program would crash when saving a description file if the model
had more than 32,767 wires.
[EZNEC Pro only]: Program would give obviously incorrect results with some
combinations of very large models and a large amount of installed RAM if the disk was being
used for virtual RAM.
Improved detection and
correction of missing directories encountered on some systems.
[EZNEC Pro only]: When using a plane wave source, necessary recalculation of
currents did not occur
when switching ground type between Perfect and Real, MININEC-type. No change was made to operation
with conventional (V, I) sources where recalculation isn't necessary when switching between the
two ground types.
[EZNEC Pro only]: Updated the hardware key driver which might be required
for current Windows 10 revisions.
The phase angles of very small currents and voltages were sometimes incorrectly shown as 180
degrees instead of the correct phase angles in some displays.
Diameters of wires imported from an ASCII file weren't processed correctly when adding to the
description. The diameters of the imported wires would be transferred to the first
existing wires in the list and the diameters of the added wires would be incorrect.
[EZNEC Pro only]: On some 64 bit systems, an "Allocation error" message would
appear when an attempt was made to run a calculation.
[EZNEC Pro/4 on 32 bit or XP systems only]: v. 6.0.4 - 6.0.6 updates were not updating
32 bit NEC-4 calculating engines, so various problems including no implementation of some bug fixes
would occur if the original installation was prior to v. 6.0.5 and updates to v. 6.0.4 - 6.0.6 were
Program would crash (Error 9) when splitting wires if the model contained any insertion objects
placed on virtual segments.
Split Wires was incorrectly in the menu of several windows other than the Wires Window. Crashes
would occur if an attempt was made to use it in those other windows.
Calculating engines and several DLLs were recompiled for better compatibility with some machines.
There were no operational changes, and no need to apply this update if you are not encountering
error messages at startup or when starting calculations.
Program would sometimes end with no error message or possibly show other errors
when running a calculation where
Stepped Diameter Correction (SDC) was being used. This did not affect
NEC-4 engines with EZNEC Pro/4 where SDC is usually off.
Recompiled DLLs with latest compiler revision and replaced all run time dlls with updated
versions to reduce rare compatibility problems.
In locales where a comma is used as the decimal delimiter, it was used as the
delimiter in the frequency and alternate Z0 values in the .s1p files. This file
correctly uses only a decimal point delimiter in all locales.
[EZNEC Pro/4 only]: Calculating engine error would occur when running
an NEC-4 calculating engine if the EZNEC output file folder had been changed from the
When a wire under the ground produced a Segmentation Check warning, the maximum or
minimum length shown in the message list was incorrect although the correct value was
used for the check.
Some old description files did not automatically convert from High to Extended
Accuracy ground when the automatic conversion option is in force.
Insertion object placement check modification in v. 6.0.1 failed to suppress some
messages involving single segment wires with more than one object.
Several minor corrections made to the manual.
Installer now installs Microsoft Visual Studio runtimes when necessary. These are
required for program operation on some Windows 8.1 and later operating systems.
[EZNEC Pro only]: Corrected problems which could produce errors on
64 bit operating systems.
Insertion object placement test showed errors when objects were placed on one-segment wires.
An error is no longer shown when the object is a transmission line or more than one
insertion object is on a one-segment wire. While placing objects on one-segment wires
has not been necessary in most cases since the introduction of virtual segments,
it shouldn't show a placement error.