No idea what's going on now, but I cannot reproduce the behaviour either.. also tried my old code posted here, but the warning doesn't pop up anymore.

I will inform once it pops again and will use the provided traceback function then.

I have a slight suspicion that it was indeed environment based on my local machine, but I have no idea what is the trigger for that.

It may or may not be related to this

2024-04-29 23:38:25,932 - clearml.Task - WARNING - Parameters must be of builtin type (Args/env/ENV[_Environ], Args/env/DATASETS/d1c4ec5c8f7e4492ab7b2a8d0b584c88/created[datetime], Args/env/DATASETS/e7f05a856ca34cd88940c4b8774f4c45/created[datetime], Args/env/DATASETS/50e10f640d7548458d9c38ab9aac571b/created[datetime], Args/env/DATASETS/e113a14fec574025a15a5c9868746c4b/created[datetime], Args/env/DATASETS/c520737c392c47608ffd52f33fc593f6/created[datetime], Args/env/DATASETS/12f2a7ee7a7f45b8866d2c5f75e92413/created[datetime], Args/env/DATASETS/640fc2e67b3b4b498fe6d9b1da764911/created[datetime], Args/env/DATASETS/cef7f5e021484b089a5eccf0c014d150/created[datetime], Args/env/DATASETS/28b1c17f1fef47a793f9ac086b2d6b10/created[datetime], Args/env/DATASETS/af33141c123843d4bf0c50db76635bba/created[datetime], Args/env/DATASETS/2b561087cf974658b576fbd17a87bc87/created[datetime], Args/env/DATASETS/366058db107e485ca273a11601e68e7a/created[datetime], Args/env/DATASETS/f4d7bdcb58534f1ebbc5c5578b6801a5/created[datetime], Args/env/DATASETS/90648781cf4f4848a2a66ca572e1edf5/created[datetime], Args/env/DATASETS/a4b6cc7161334df1ad94143a819842d6/created[datetime], Args/env/DATASETS/853a677148c5417e8cc003d6761236e3/created[datetime], Args/env/DATASETS/b4f89b652b1940848f186c5ab9e2de3f/created[datetime], Args/env/DATASETS/231b526d445b416fa487fc902a1ebb0e/created[datetime], Args/env/DATASETS/55a19d9bd15c4c67a6931e3eba7b454a/created[datetime], Args/env/DATASETS/e8289fd5259c4e78830fd2e2d88a6d51/created[datetime], Args/env/DATASETS/55fba0728c3d4af1953fa0fe04b30ce6/created[datetime], Args/env/DATASETS/abc76956f1de41b386fa805e8858c884/created[datetime], Args/env/DATASETS/326ea43fc9ff4e6db5209218b6020ca6/created[datetime], Args/env/DATASETS/172affc0c4bb4a369e75f685782b5ad8/created[datetime])

But that's not used on my side anymore.

It's a weird warning and now it's a weird unreproducible warning, even though I had it on each trial run earlier today.