Unacceptable limitation on log file length under Windows

[Francesco Casella]

I ran the attached test script under windows using the latest 64-bit nightly; I get the following error message

Error: File too large to fit into a MetaModelica string: Test9.log.

If I reduce N from 50 to 45 the error is not triggered, and the resulting size of the log file is 13 MB, which is large but not unconceivably so.

I cannot reproduce exactly the same behaviour on Linux because I have a different version of the solver there and the nighly is broken, but I can easily produce log files in excess of 60 MB there on this example by increasing N, and I once produced a 2+ TB log file with some large test case, so I guess this is a Windows-specific problem.

Please make sure that no arbitrary limitations (except free mass storage space) are enforced on log files under Windows.

[Francesco Casella]

Test case

[Adrian Pop]

This seems to be a bug in MetaModelica. The max size of string for 64bit is 18014398509481984 * 4 characters.

[Adrian Pop]

Found the problem:
​https://github.com/OpenModelica/OMCompiler/blob/master/Compiler/runtime/systemimpl.c#L358
That particular define #ifndef _LP64 is not working on Windows 64bit.

[Adrian Pop]

Fixed in 7deec2/OMCompiler.

[Francesco Casella]

Thanks Adrian! I guess not many people turn on LOG_NLS_V on systems with hundreds or thousands of coupled nonlinear equations, but for those who do this was particularly frustrating.