Werk #14468: Extension packages: Fix error on usage of "mkp show"

Component User interface
Title Extension packages: Fix error on usage of "mkp show"
Date Aug 15, 2022
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.2.0i1 2.1.0p10
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

If the command "mkp show" was used with mkp files like "my_mkp.mkp", the error "Cannot open package my_mkp.mkp: I/O operation on closed file" occurred.

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