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Hi Kwan, re: > I comiled the program. But it still could not assign MISS correctly. This is very strange. The code that checks for missing values (as specified by the MISS= keyword) must be off just a bit (e.g., -9999.000001 or -9998.9999999, etc.) making the comparison inexact. If the values were integers (not floating point), the conversion might work as it should. Just to make sure... the version of txt2md.k being used _is_ the newly built one, correct? > I saw that the first line in the program showed SSEC. Does it mean it > is the SSEC version? No. I modify/add to the SSEC version to create the Unidata version. The big difference between the two is the support for doing unit conversions through the UNIT= line). Cheers, Tom **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: YAF-607526 Department: Support McIDAS Priority: Normal Status: Closed