Problem with filecopy

[htuser]

Dear all,
I'm unable to copy a group of file to a folder using filecopy function. It's because i require your precious help. For a quick help, please see the application(copy_data) in attached folder.
In a other way , i can't copy a file to another file, also using filecopy, when using menu. The problem is that my data file name are dynamic using operator ID.

When i try to create dynamic filename with filecopy with the same parameters as the

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"InputData=%s",concat(strip(dataFolder),strip(surveyorsurname),"_",strip(surveyorname),"_",strip(computerid),".dat"))

; that's doesn't work to create the filename of

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filecopy(concat(strip(dataFolder),strip(filename)), backupfolder);

However, it work perfectly in the menu(pff) and create the datafile with proper name.
Thanks in advance for your help.
HTUSER