Error while 2D Classification

Hi @hsnyder,
thank you all for this thread.
Like @jr10, also for me re-extracting the particles solved the problem. I had encountered the same issue described by the other users when doing either ab initio or hetero refinement. This happened after merging 2 different “extract from micrographs” jobs located in two different workspaces of the same project. But as I said re-extracting the particles was the solution.
By any chance is there now a way to avoid this problem all together, so to be able to go back from the merged to the unmerged particle stacks?

For the record, this was the original error:

[CPU: 1.61 GB] Traceback (most recent call last):
File “/data/cryosparcuser/CRYOSPARC/cryosparc_worker/cryosparc_compute/jobs/runcommon.py”, line 1811, in run_with_except_hook
run_old(*args, **kw)
File “cryosparc_worker/cryosparc_compute/engine/cuda_core.py”, line 131, in cryosparc_compute.engine.cuda_core.GPUThread.run
File “cryosparc_worker/cryosparc_compute/engine/cuda_core.py”, line 132, in cryosparc_compute.engine.cuda_core.GPUThread.run
File “cryosparc_worker/cryosparc_compute/engine/engine.py”, line 1028, in cryosparc_compute.engine.engine.process.work
File “cryosparc_worker/cryosparc_compute/engine/engine.py”, line 87, in cryosparc_compute.engine.engine.EngineThread.load_image_data_gpu
File “/data/cryosparcuser/CRYOSPARC/cryosparc_worker/cryosparc_compute/particles.py”, line 22, in get_original_real_data
return self.blob.view().copy()
File “/data/cryosparcuser/CRYOSPARC/cryosparc_worker/cryosparc_compute/blobio/mrc.py”, line 127, in view
return self.get()
File “/data/cryosparcuser/CRYOSPARC/cryosparc_worker/cryosparc_compute/blobio/mrc.py”, line 122, in get
_, data, total_time = prefetch.synchronous_native_read(self.fname, idx_start = self.page, idx_limit = self.page+1)
File “cryosparc_worker/cryosparc_compute/blobio/prefetch.py”, line 67, in cryosparc_compute.blobio.prefetch.synchronous_native_read
RuntimeError: mrc_readmic (1) 454: Invalid argument
[arguments] /data/cryosparcuser/test/P15/S1/extract/template/300/FoilHole_30842771_Data_30843964_30843966_20211002_190141_Fractions_patch_aligned_doseweighted_particles.mrc, 0, 0, 479, 480, 2, 40