Jul 29, 2025 · The record written by the standard unformatted output in your code works well. As far as I understand, it is the unformated used-defined derived-type I/O that produces wrong …

Mar 22, 2016 · There are ways to "reinterpret" the type, but you have to know which type you want first. Furthermore, with sequential unformatted files you need to know in advance how …

Aug 23, 2016 · Unformatted files contain record-length information, encoded in a vendor-specific way, interspersed with the data, in the file. Files with FORM='BINARY' are nonstandard, and …

Aug 23, 2012 · Was the data written by a fortran program? As Steve alluded, Fortran unformatted IO is written with record identifiers that bound each record and specify the length of the record …

The default SEQUENTIAL UNFORMATTED file layout on OpenVMS is called 'SEGMENTED'. A logical record may be split across multiple physical records - each has a 16-bit prefix of flags …

Apr 13, 2020 · Unformatted binary files use a record size header and trailer, which can be different between different compilers or versions. You may want to review the gFortran option " …

Nov 29, 2022 · This suggests an alternative format for larger ifort unformatted records could be 4-bytes else 12-bytes, ie a first 4-byte of header as -1, followed by an 8-byte length value.

Aug 26, 2016 · On what kind of system was the unformatted file written? Do you know what the file is supposed to contain? It does appear to have little-endian format, but the numbers do not …

Apr 9, 2019 · Dear friends from the ifort community, recently I have been confused by 2 run-time errors while reading an UNFORMATTED file which I opened first with

May 9, 2008 · Here is my code, work in windows but not in linux: program circle CHARACTER*1 A INTEGER IOS OPEN (UNIT = 789, & FILE= 'charlie.dem', & FORM =