UNV reader block error" in OptiStruct OP2 file
I am encountering an error when trying to run fatigue analysis using the OP2 file generated from OptiStruct. The fatigue solvers I have tried are Fe-safe and an in-house tool. The error message is as follows
2025-06-18 19:55:47 HyperWorks Information: UNV reader supports only block 55 and block 2414 for the results2025-06-18 19:55:48 HyperWorks Error: Failed to attach results.
I was able to run fatigue analysis using an OP2 file generated from Nastran without any issues. How can I resolve this error and successfully run the fatigue analysis with the OP2 file from OptiStruct?
Below is my request generating the files. I am running a global local model
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Altair Community Member
OPUpdated by srinivas rallabandi_21059
Is Global modal results can be called in submodel using op2 instead of H3D? using ASSIGN statement in Optistruct


I think the data blocks for nastran and optistruct writing op2 are not same.