COBRT030 File system is read-only (Recoverable) The file system which you are using is read-only, which effectively means that it is write-protected. You have tried to change
a file in some way, for example you might have tried to WRITE to a file or to DELETE information in it.
COBRT031 Not owner of file (Recoverable) You are trying an operation on a file but the file's owner has not given you the necessary permission for that operation.
You could for example be trying to alter the access modes for a file, which only the file's owner can do.
COBRT033 Physical I-O error (Fatal) You have a hardware error of some type. Perhaps you have not put a disk in the relevant drive or you might have tried to WRITE
to a disk but the processor detected hardware interface has failed.
COBRT037 File access denied (Fatal) Your attempt to access a file has been denied by the operating system. You might have tried to write to a write-protected
file or you could have tried to read from an output device.
COBRT038 Disk not compatible (Fatal) You have tried to access a disk that is incompatible with the current version of your operating system. This could be because
it was created under a previous version of the system or it could have been created under a completely different operating
system. You would also receive this error if you tried to load a disk with a name that clashed with a disk that was already
loaded.
COBRT039 File not compatible (Fatal) You have tried to access a file that is not compatible with the structure of files under the current release of your software.
This could be because the file was created either under a different operating system or under a previous version of your current
system.