Hi Reza,

You have a backup of the pipeline file inside each job directory. Just copying it to the project directory will do the trick.

Not sure why the pipeline file is dropped, but the error alone is not enough. We've seen it once when multiple users access the same project simultaneously. Likely when the lock-file mechanism is manually overridden.

Cheers,

Dari

On 15 Apr 2017 18:21, "Reza Khayat" <[log in to unmask]> wrote:

Hi,

Periodically I get the following error when launching Relion:

WARNING: trying to read pipeline.star, but .lock_default_pipeline.star exists!
This is a protection against simultaneous writing to the pipeline by multiple instances of the GUI.
You can override this by manually deleting the .lock_default_pipeline.star file.
This instance of the GUI will try for 1 minute to see whether the lock disappears.
ERROR: PipeLine::read has waited for 1 minute for lock file to disappear. You may want to manually remove the file: .lock_default_pipeline.star
File: /home/rkhayat/TEMPUS/relion/src/pipeliner.cpp line: 470

I think the error also deletes the default_pipeline.star file, and thus the history of the session. Is there a way to regenerate the default_pipeline.star file and regain the history of the session? Thanks.

Best wishes,
Reza

Reza Khayat, PhD
Assistant Professor
City College of New York
Department of Chemistry
New York, NY 10031