Hello all
I have submitted my query to the history of posts before posting myself and found many very cool looking solutions, but did not solve my issue.
My situation :
I have 27 identically configured excel files with each having three same configured sheets I want to input "in one go". I also want to be able to trace sheet name.
They are "unfortunately" .xls formats. The file names are like 'PE - 1.xls'. When I try to apply 'dynamic input' I get awkward string error messages (unable to see sheets - see below). When I wish to select multiple sheets in the 'input data' I cannot select multiple sheets, only one at a time.

Is there anything I am basically doing wrong ?
Is it linked to the "-" symbol in file name ?
Thank you for your tips.
Chris