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Thank you for replay, the main point is that my colleague made mistake and have calculated wrong record length (calculated record length correctly, but did not use '-assume byterecl' flag). Then wrote data without the flag. I would like to fix it using record length based on bytes. For example for real*8 array with 10 elements: 1) his record length (SRL) is 10*8*4 = 320 2) based on bytes record length (DRL) should be 10*8=80 How can i read data based on SRL and write is based on DRL. I tried to read it using recl=320 but it does not work (it saves data, but i am not able to read it using different sofware). thanks, Jaromir On 26/04/2018 13:56, arrl wrote: > On 4/26/2018 4:56 AM, Jaromir Jakacki wrote: >> Dears, >> I have data that has been written using one record length and would like to read them and then write using another record length (fortran direct access). I use Intel compiler that use default length unit is 4 bytes word. But i am able to use compiler flat '-assume byterecl' and in this case the record length will be 4bytes*2 (for double precision). Is it possible to use both record lengths in one fortran script? >> Thank you in advance for your help >> with best regards, >> Jaromir >> > As you pointed out, -assume byterecl is one of the options ifort > requires for Fortran standard compliance. I'm not certain whether this > is the primary point of your question. > If you are copying a direct access file, OPENing separate UNITs should > permit you to specify RECL individually. If you are changing all data > items to double their width, and you wish the new file to contain the > same number of records, the new RECL would be twice the old one. > I don't know why you bring up the number of bytes of storage of an > individual datum. Unless the old file was written with, for example, > RECL=4, the normal situation would be a RECL of at least 132. > I'm not certain that Intel specifies a default value of RECL. In > general, the old file would require reading by the same compiler with > the same RECL used when it was written. >