Ventana software support forum

Nothing that I can think of.. Perhaps it is something more fundamental to the machine. I will rebuild it and see if the problem goes away
Many thanks for your help
Phil

I am using 5.10e in Windows 7
Phil

Many thanks Tom, I have renamed the ini files but still seem to have the same problem, which makes me suspect that something else has been corrupted. When I try to create a new model (or open vensim for the first time) the error message appears I am able to load existing models or for that matter ig...

Many thanks.. Unfortunately it didn't seem to work. I have two versions of vensim.ini on my machine. I wonder if this has something to do with it? Thanks Phil c:\windows\vensim.ini [vensim] Units1=$,Dollar,Dollars,$s Units2=Hour,Hours Units3=Month,Months Units4=Person,People,Persons Units5=Unit,Unit...

Hi I have been using Vensim for many years. Recently my vensim installation seems to have become corrupted. When I load a new model I get a message "Unable to open 34:0,,,.mdl to read model". Vensim opens and can run simulations etc, but the graphing functionality doesn't work. I tried rei...

Will do.
Thanks
Phil

brilliant!
many thanks
Phil

My seven year old son has Type 1 diabetes and we are having a lot of challenges in regulating his blood/sugar levels. Given that we have heaps of measurement data, I was thinking that it might make sense to build an SD model to see if we can get a better understanding of what is going on. Wondering ...

Many thanks
Phil

Hi I am running a large number of simulations via a webservice using the multicontext dll. When I run the simulations for a while the number of ctxtxx folders grow and since my runs have a lot data, they each take up a lot of space. Is there a way of deleting the run data after I have had the opport...

Got it.. That makes sense

Thanks
Phil

Given that it is necessary to specify the number of loops in an external function. Is there a limit to the number of loops that an external function can have?

Many thanks
Phil

OK that makes sense. What is required to get the multicontext dll upgraded?
Thanks
Phil

Many thanks, You're right, the problem was with the version of Vensim.h file I was using. When I went back to an earlier version (which had the correct External Function version number) it worked I suspect that the vendlstc.dll file that I am using is from an 5.10d or possibly earlier. Would that ca...

The error log is recording the following error: External function version mismatch need version 5860 (got 51050) I have created a file called inifile.ini, which I have placed in the same directory as the .vpm model. The inifile.ini has the following line: ExternalFunctionLibrary=C:\wwwtr\vensimmodel...

I am trying implement several external functions while using the multicontext dll (vendlstc.dll). Currently the external function is not working and I suspect it is because I haven't linked my external function to the appropriate .lib file. In the script for the external function I see the following...

It would be helpful for me if external function integration was simplified - particularly for cases where loops (such as 'do while') are needed

Phil

Many thanks!
Phil

You're right I think that is the problem.. Looks like the easiest solution is to use a standard approximation

many thanks for your help

Phil

The error that I am getting is..

Error 7 error LNK2019: unresolved external symbol _erf referenced in function _ERF venext.obj venext6

Many thanks
Phil

I am trying to write a simple external function in venext.c to calculate the error function. I have added #include math.h in the declarations and tryed to use the erf() function. When I do this I get a compile error.
Would appreciate any assistance with this

Thanks
Phil

Bob

I tried to used this command without success.. Is it for the multicontext version?
I do plan on buying this, but am testing on a local machine for now

Thanks Bob
What command do I use to close the context?

I am developing several programs that run a .VPM file via a Webservice interface. When I run the webservice and find an error in the underlying model, I am unable to republish the .VPM file. Basically the webservice seems to keep it locked up.. Is there any way I can unlock the file without restarti...

Thanks Bob, I upgraded to version 5.9 and it seems to be working now