Fix grep for Mem block

[OkayDave]

• Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Bug fix for Mem block

• What is the current behavior? (You can also link to an open issue here)

Doesn't work

• What is the new behavior (if this is a feature change)?

Works again

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No.

• Other information: