I need to execute OS commands from within a x64 pharo 7.01 image on centos7 (for example: 'zip -r 123.zip zipme/'). I found these 3 tools: OSProcess, OSSubprocess, LibC uniqueInstance But I did not find any docu on which one to use for which use case. * OSProcess is in the catalog browser but fails loading because of ByteArray>>ifNotNilDo: -> So OSProcess is not to be used with p7 ? * OSSubprocess loads via catalog browser and the following snippet works (even though 64 bit): OSSUnixSubprocess new    command: 'zip';    arguments: #('-r' '123.zip' 'zipme');    redirectStdout;    runAndWaitOnExitDo: [ :process :outString |       outString inspect    ] So is it ok to use OSSubprocess with 64 bit even though documented as 32 bit only ? (here: https://github.com/pharo-contributions/OSSubprocess#installation) * LibC uniqueInstance system: 'zip -r 123.zip zipme/' ... works, but I don't know if its the right tool for this. Is there somewhere more info on which tool to use for which use case ? Thanks in advance! Albrecht PS.: I need to use zip as os process only because of this issue: https://github.com/pharo-project/pharo/issues/2584