Oracle Message ORA-01237 - cannot extend datafile string

ERRORcannot extend datafile string
CAUSEAn operating system error occurred during the resize.
ACTIONFix the cause of the operating system error and retry the command.

580320INST: SAP Web AS 6.30 Inst. on UNIX - Oracle
492221INST: SAP Web AS 6.20 Inst. on UNIX - Oracle
9695196.20/6.40 Patch Collection Installation : Oracle/UNIX