workstation have Windows 7 Professional and all are able to retrieve the version number of exe file except 1

Code is
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lcExeFileName = SYS(5)+SYS(2003)+'\path\programname.exe'

If Agetfileversion(aCver,lcExeFileName) > 0 && we have version
this.Caption = ALLTRIM(this.Caption) + ' ...........ver('+ALLTRIM(aCver(4))+')'
this.p_version = '..ver('+ALLTRIM(aCver(4))+')'
ELSE
MESSAGEBOX('Could not get version',0+4096,'Missing Version',1500)
this.p_version = 'unknown'
ENDIF

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the same path and exactly the same programname.exe

However, one workstation fails

any suggestions on what to look for?

thanks in advance