Cannot open {file} Permission Denided

[hanster13]

When I run mseed2sac in Ubuntu , it will try to run but I get this error message Cannot open output file: AV.ADAG..BHE.M.2020.189.090259.SAC (Permission denied).

How do I fix this?

[chad-earthscope]

This sounds like the program cannot write to location (directory/folder) where it is running, the so-called "current working directory". If true you have two choices:

1. run mseed2sac from a location that is allowed to be written by the user running it

2. change permissions on the file system to allow the user running mseed2sac to write to the directory in which it is being executed