Getting a Memory allocation error in Dymola

Question

I'm using Dymola 2019 and have to use +50 instances of CombiTimeTable in my model to load a CSV file with a size greater than 200 MB (Yearly Weather data with a resolution of 60 s).

An additional increase of my model resulted in getting the following error message in Dymola:

Error: The following error was detected at time: 0
Memory allocation error
FixInitials:Init: Integrator failed to start model.

A dirty fix to this problem is possible if I split up the big csv file into smaller shunks, but this is obviously not the best solution to my problem.

How can I increase the designated Memory for Dymola or what is a best practice loading big csv files. Is another format more efficent?

You could try to import the data using the sdf data format. The free library comes with your dymola installment. Open the library under File-->Libraries-->SDF. You can use the SDFEditor or python to create the files. — f.wue

Hans Olsson Hans Olsson · Accepted Answer · 2019-04-03T09:43:02

Setting Advanced.CompileWith64=2 inside Dymola should generate a 64-bit dymosim-executable that avoids this issue.

Specifically the message "Memory allocation error" only occurs if you are out of dynamic memory for malloc.

Getting a Memory allocation error in Dymola

1 Answers