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optistruct modal analysis error 15(about memroy issue) urgent

Altair Forum User

When use optistruct to analysis mode, error 15 occured.

The out file display Resource useage information:

Current memeroy 1646Mb

Estimated min memeroy for check run 1680Mb

So there is a fatal error.

But the system ram is 16GB., not other program running. I try -len -fixlen parameter, it doesn't work. This model have about 800 000 nodes. The oprating system is XP 64bit, HW64.

I used the same model on several other computers, the same error occurs.

Why there is only 1646Mb , however the system ramain 16GB & hw64 can support this ram.

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Altair Forum User

try increasing your pc's virtual memory preferably double the size of your current RAM.virtual memory is a portion of your hard disk the the computer will use as RAM..had the same problem before.

Altair Forum User

When use optistruct to analysis mode, error 15 occured.

The out file display Resource useage information:
Current memeroy 1646Mb
Estimated min memeroy for check run 1680Mb
So there is a fatal error.

But the system ram is 16GB., not other program running. I try -len -fixlen parameter, it doesn't work. This model have about 800 000 nodes. The oprating system is XP 64bit, HW64.

I used the same model on several other computers, the same error occurs.
Why there is only 1646Mb , however the system ramain 16GB & hw64 can support this ram.

you can edit the hwsolver.cfg file from the installation directory, you can edit the initial ram option, ramdisk option etc. then optistruct always uses that values as default. you can also try -ramdisk 5000 etc. another solution is to change the stack size by kmp_stacksize environment. check the help file for stacksize issue. and be sure that your system does not consume all the memory, maybe something is consuming your physical memory. and you can try -core out option also.