Hello listers, Last weekend we upgraded our HP3000 from MPE iX 4.0 to 5.5. We have lots of powerhouse and cobol applications running. One of our cobol programs gave the following error: Filename: F705D01 File status is 48 FILE NOT OPENED or MODE INCORRECT [47,48,49,9x] WRITE (COBERR 638) Program file: co705011.obj705.pers END OF FILE (FSERR 0) The file mentioned above is a direct file opened I-O, read once and written once. After altering the sequence to: Open Input/read/close and Open Output/write/close the problem was solved. Is this a known bug?? Are there more bugs like this?? T.I.A. Cees Tuinder, Boskalis-Westminster Dredging Co., the Netherlands.