[TRNSYS-users] Regarding Libeng error

[Michaël Kummert]

Mohammad,

The problem might be due to a TRNSYS update. To make sure, you could 
make a backup of your TRNSYS dir, uninstall TRNSYS AND DELETE EVERYTHING 
IN THE INSTALLATION DIR (E.g. C:\Program Files\Trnsys16) and then 
reinstall the latest version (16.01.xxxx).

Longer explanation and other option:

Libeng.dll should only be loaded (or searched for) if Type155 (Calling 
Matlab) is used in the simulation but if a copy of Type155.dll is 
located in the Userlib directory (or one of its subdirectories) TRNSYS 
will get confused and try to load it - which will fail if you do not 
have Matlab installed. This is one of the reasons why some early TRNSYS 
updates were telling you that you HAD to do a clean install.
A quick check would be to search for Type155.dll on your machine. You 
should have only one copy, in C:\Program Files\Trnsys16\Exe (assuming 
you installed TRNSYS in the default location). If you have any other 
copy in the UserLib directory (or a subdirectory) you can delete it and 
try again but I would still do a clean install.

I don't really understand why the problem would happen in TRNEdit and 
not the Studio. Are you sure you are running the same version of TRNSYS 
in both cases (e.g. did you install an update in a different directory 
and end up with two or more TRNSYS versions)?

Here's a tip that can be useful to track down similar problems: At the 
beginning of the simulation, TRNSYS writes some useful information to 
the log file (a file created in the project directory, with the same 
name as the deckfile and with a ".log" extension - make sure you have 
got the right file, check the time!)
Here is a typical log file so you can compare:

[...]

### This will tell you which copy of TRNSYS you are running for sure ###

  *** Notice at time        :         0.000000
     Generated by Unit     : Not applicable or not available
     Generated by Type     : Not applicable or not available
     Message               : The TRNSYS Executable (TRNExe.exe) and main 
DLL (TRNDll.dll) are located in "C:\Program Files\Trnsys16\Exe"

[...]

### Similar messages tell you which DLL's were found in UserLib ###

  *** Notice at time        :         0.000000
     Generated by Unit     : Not applicable or not available
     Generated by Type     : Not applicable or not available
     Message               : 
"TESSApplicationsLibrary_ReleaseVersion203.dll" was found but did not 
contain any components from the input file.


I hope this helps,

Michaël Kummert
ESRU - University of Strathclyde
Glasgow, UK


mohammad abdunnabi wrote:
> Dear Divad
> Dear Diego
> 
> Thanks a lot for your ever support. in fact, I searched in my computer however I didn't have Libeng.dll the only what I have is Libeng.lib in the optional folder, the second thing I haven't got MathLab in my computer this means the calling mathlab example will not work.To clarify the problem again, when I run sdhw (example) in Trnsys Studio it is working fine, the message doesn't appear, however, when I run it in the Trnedit the message appears (the application has failed to start because Libeng.dll was not found) and when I press ok button it works and gives result (but this doesn't serve my program). I encountred this problem recently!! I was using it without any problem for the whole past year (may be due to the upgrade to the latest version but I have doubt about that).
> 
> please any further suggestions
> 
> Many thanks in advance
> 
> 
> Mohammad
> 
> 
>  
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