Minor fixes in apps

Nikos Mavrogiannopoulosrequested to merge
tmp-fixes into master

This addresses some unchecked allocation errors and other minor issues in tools.

Checklist

  • Code modified for feature

Reviewer's checklist:

  • There is a test suite reasonably covering new functionality or modifications
  • Function naming, parameters, return values, types, etc., are consistent with other code
  • This feature/change has adequate documentation added
  • No obvious mistakes in the code

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