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A quick question or two concerning the definition of new operators in F90. There are certainly other ways to tackle this problem that I know will work but I was curious to see if I could do it via overloaded operators. I tried to code something like an "i++" operator, but ran up against the constraint that the input to any user-defined operator has to be strictly intent(in). So, the value of the input argument is never changed and i++ doesn't work. Is there any way around this? And, a small syntax question. See the code below. Is the 'USE MISC_UTILITY, ONLY: .PP' syntax ok? The compiler complains that .PP. hasn't been declared as a user-defined operator. I'm using the SGI 7.4 compilers which have had problems with USE XXX statements before. MODULE MISC_UTILITY INTERFACE OPERATOR (.PP.) MODULE PROCEDURE ADD1 END INTERFACE ..... END MODULE MISC_UTILITY SUBROUTINE X (..... ) USE MISC_UTILITY, ONLY: .PP. ! doesn't compile USE MISC_UTILITY ! compiles END SUBROUTINE X Catherine -- ------------------------------------------------------------------------- Catherine Moroney phone : (818) 393-3392 Jet Propulsion Laboratory fax : (818) 393-4802 MailStop 169-315 email : [log in to unmask] 4800 Oak Grove Drive Pasadena, CA 91109-8099