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thanks for the hint, bit of modification got the script working :D

I am not to certain what you mean and how to pass eval the command value

I am trying to pass a regular expression variable from a simple script to sed
to remove entries from a text file

e.g.

a='aaaa bbbb cccc ...|...:'

then executing sed from the script
...

I am trying to pass a regular expression variable from a simple script to sed
to remove entries from a text file

e.g.

a='aaaa bbbb cccc ...|...:'

then executing sed from the script
...