This doesn't seem have anything (not even the most remotely) to do with oclHashcat.
The error message implies (according to my fast research) that your system has some serious problems, either with RAM (main memory) or the disk / file system.
Maybe this only happens for you with oclHashcat/cudaHashcat because you are not running any other program that needs those resources in this particular manner, but at the end this is not a problem of oclHashcat/cudaHashcat, but your OS/disk/RAM/faulty drivers etc.
Just look it up online and you will find dozens of threads,tutorials,blogs that explain what the error message means, how to troubleshoot it etc
The error message implies (according to my fast research) that your system has some serious problems, either with RAM (main memory) or the disk / file system.
Maybe this only happens for you with oclHashcat/cudaHashcat because you are not running any other program that needs those resources in this particular manner, but at the end this is not a problem of oclHashcat/cudaHashcat, but your OS/disk/RAM/faulty drivers etc.
Just look it up online and you will find dozens of threads,tutorials,blogs that explain what the error message means, how to troubleshoot it etc