Mt_prep_snap selpsc_patch: Command not found. psclonlat: Command not found. pscdem: Command not found. pscphase: Command not found

Hello,everyone. When I run mt_prep_snap 20170107 /home/zzz/StaMPS/StaMPS-4.1-beta/INSAR_master_date/stack1export 0.4 5 5 50 50 in my export folder, it reports an error as shown below,this error occurs under all 25 patches.


My environment configuration is shown below.

How can I solve this problem, I hope to get a solution, thank you all!