There have been sporadic reports of incompatibility between 64-Bit Office VBA and the 64-bit OpenDSSEngine COM server. A typical error is some kind of "access violation" that may come out of KLUsolve. This error means that there is a bogus memory address and the program tried to access a memory location that it is not allowed to access.
The problem does not seem to occur on Windows 7. At least we have no reports of problems. Most of the reports come from folks running Windows 8.1 and it is assumed Windows 10 may have the same issues. There are sporadic reports of installer failures and registration failures on these systems. You may get a complaint that you do not have sufficient privileges to install the program. You will probably have to perform these operations from an elevated administrator level. I have found that simply repeating the operation will sometimes solve the complaint, so we may have to update our installer once we figure out what the issue is.... read more
There is a vibrant OpenDSS user community in Brazil. Paulo Radatz, a student at the University of Sao Paulo, wrote a nice report for his undergraduate project and has contributed the DSS files from his project as a good example of how to use the program.
The report is in Portuguese, but is still understandable if you know the language of mathematics and OpenDSS script.
You can find everything at:... read more
In the files download area. 188.8.131.52 is still there for the moment.
Davis Montenegro has done some investigation of how to do early binding to the COM interface in various languages and posted a description in the Help forum:
There is also a report of his study results attached to the posting as well as in the Doc Folder:
Several new Export commands. Also, some new properties in the COM interface as well as cumulative additions and bug fixes since 184.108.40.206,
You can get it from the main download site for OpenDSS.
Until we can get the Mediawiki back up and working, I've posted PDFs of many of the pages here:
These documents contain many useful materials and I recommend all users download these and read them.
See the announcement on the Open Discussion Forum or visit Xendee.Com.
The variable facility (@var) in OpenDSS has been enhanced. You can now use variables to define element names and bus connections.
This allows you to define a generic description of an subnetwork that might be used repeatedly and use the var facility to set the actual values. As an example, see:
This beta includes an updated LOAD model for harmonics analysis that is described in the following document:
Of course, the Beta versions may be found in these folders:
An installer for version 7.6.4 build 36 has been posted on sourceforge.net in the usual place:
This version has several updates and bug fixes:
This version introduces named variables in OpenDSS script. This enables scripts like the one below that uses named variables (beginning with the ‘@’ character) to define text strings to be used in the scripts. The ‘var’ command was introduced to define and display variable values:... read more
I just posted a new beta build of 7.6.4 version. You can find it at the usual place:
Please report any issues found.
There a couple of significant changes that warranted increment the release version from 7.6.3 to 7.6.4. The build number remains sequential so it is easier to see where issues may have cropped up.... read more
The Magic Carpet Ride video of a cloud passing over a distribution feeder with rooftop solar PV generation has been posted onto this site. You can find a link to it here:
Note that this is a 20 MB download.
Installer for 7.6.3 build 31. Various minor bug fixes and enhancements. Most are discussed in the Discussion Forum. Search for recent references where users were instructed to get the latest beta.
Still looking for a suitable host for the Mediawiki site.
The MediaWiki site on SourceForge.net that supported the Type Library Documentation has been retired as of 6/19/2014. Unfortunately, we didn't know it was being retired until after the fact and are now actively investigating other means of posting the material that was once on the OpenDSS Wiki.
Roger Dugan 6/24/2014
See the PDF for the COM interface documentation:
We have created a page in the Wiki that lists the entire type library with enums, interface definitions, with properties and methods. You can find the documentation here:
Latest beta builds Posted here:
See post in Open Discussion:
See Wes Sunderman's post in the Experts thread:
At Version 220.127.116.11 we added an interface to the internal OpenDSS Parser.
Check out the documentation in the Wiki:
The Help and Open Discussion forums have had a mixture of requests from all experience levels of users. This can make it difficult to wade through hundreds of posts to find what you want. So we've added two new forums: Expert and Beginners.
The posts in the Expert Forum will be for those users with advanced needs and questions.
The posts in the Beginners forum will be for those users needing basic help getting started.... read more
The 18.104.22.168 version installer has been posted. The 22.214.171.124 installer is still available at the same site in case you have a problem with the 126.96.36.199 version.
There are several additions and bug fixes since June 2013, including:
This version includes recent work on current-limited inverter models for Generator model 7, PVSystem, and Storage models.
Also, several new COM interfaces, including PDElements and XYCurves.
This beta version fixes several things including an issue with certain Plot commands that was throwing an exception, fixes to SAVE CIRCUIT, and some new stuff on reliability calcs (still in progress).
PDElements Reclosers Relays XYCurves
Changes to Interfaces:
Meters CktElement Bus
Beta Version Locations:
One of our users was kind enough to write down some things he thought would be useful for new users. I posted the document today.
If you have SVN linked to the repository, you can simply update. Otherwise, you can find it under the Doc folder under the name "OpenDSSPrimer":
/ trunk / Distrib / Doc /
The 188.8.131.52 version has some new ways to define the symmetrical component impedances of VSOURCE and REACTOR objects.
You can enter the impedance as a two-element array represent the real and imaginary components. For example:
This represents Z1= 1 + j2.
You can also enter a Z2 value that is different than Z1, which allows you to make equivalents of rotating machines. The first time you set Z1, the values for Z2 and Z0 are defaulted to the value entered for Z1. Then you can change Z0 and Z2.... read more
The 184.108.40.206 version of OpenDSS (now posted in the Distrib folder -- under Trunk) adds persistence to the font name and style (bold and italic are the options you have).
The values are saved in the Windows Registry. They are updated when you exit the program if you change the font parameters.