RuntimeError: parallel_for failed: cudaErrorIllegalAddress: an illegal memory access was encountered

[jude vishnu]

Dear all,

I get the following error when using the fire minimizer (in both hoomd 2.9.6 and 2.9.7).

(Please have a look at the txt file "mini_error" atttached to see the complete error).

I have attached my scrip along with the initial trajectory file which reproduces the error .

Can someone please take a look at this and let me know, what could be the possible reason for such an error.

Regards,

Jude

[Joshua Anderson]

Jude,

This is a known bug in 2.9 and is fixed in 3.0: https://github.com/glotzerlab/hoomd-blue/issues/588

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Joshua A. Anderson, Ph.D.

Research Area Specialist, Chemical Engineering, University of Michigan

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<minscript.py><mini_error><initial.gsd>

[jude vishnu]

Joshua,

Thank you for your response,i tried running it for a different initial trajectory, and this seem to not happen. Can you let me know why this error is only being triggered in certain cases (Just out of curiosity).

I am attaching the new initial trajectory here.

Regards,

Jude

[Joshua Anderson]

The bug in FIRE on the GPU in v2.9 does not depend on the initial condition nor does it depend on how you structure your script. The FIRE energy minimizer always accesses undefined memory in v2.9. These memory accesses may or may not cause an error and may not, but very likely will always give incorrect simulation results. Upgrade to the latest version, v3.3.0 and the FIRE energy minimizer will work correctly on the GPU.

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Joshua A. Anderson, Ph.D.

Research Area Specialist, Chemical Engineering, University of Michigan

To view this discussion on the web visit https://groups.google.com/d/msgid/hoomd-users/1ed5f414-66d3-4c8b-9ec6-52fa805b5952n%40googlegroups.com.
<initial2.gsd>

[jude vishnu]

Thanks Joshua

To view this discussion on the web visit https://groups.google.com/d/msgid/hoomd-users/D59640C2-F02B-4869-A51A-93B25D05141D%40umich.edu.

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Yours truly,

Jude Ann Vishnu