Regular expression for uppercasing not working

Dear all!

I have no success in changing the case of found items with Find/Replace using Regular expression in FrameMaker 14.0.3.500.

I want change lower case characters after n-dash followed by blank b< the upper case equivalent:

Assume no change in maker.ini, hence RegularExpressionSyntax=Perl

Find:      – ([a-z])

Replace: – \U$1 or – \u$1 or – \p{Lu}$1

Consider case: on or off

=> None of the replacements does the job!

Then I have tried various things with RegularExpressionSyntax=egrep  or grep.

No success either.

My syntax reference is Replacement Strings Reference: Context and Case Conversion

Bug? Wrong syntax?

Klaus Daube