How can I make all instances of a variable upper case

I have a variable where all the data needs to be converted to upper case.  There are about 40,000 instances of the variable in the vault.  I don't care that the old revisions are updated -- I just want it all in upper case.  ...and I don't want to retype everything one file at a time through the PDM Explorer interface.

Please point me in a direction for solving this.

Regards,

Thys

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