You just tried to remove an open driver.

Close failed; Permission to close .MPP driver was denied.

Requested Read/Write permission dosen‘t match drivers open permission. Or attempt to open RAM serial driver failed

Driver Ref Num doesn’t match unit table.

Driver can’t respond to Write Call.

Driver can’t respond to Read Call.

Driver can’t respond to Status Call.

Driver can’t respond to Control Call.

Hard Error in ROZ.

Driver opening Error (Parameter RAM is not configured for this connection.)

Driver opening Error (This port is in use by another application.)

Hardware Error. (Excessive collisions on write).

Unknown!

No router available for non-local send.

Error opening socket or Invalid Address or table is full.

Ran out of memory! Not enough room in the heap.

Low-level disk error.

Low-level disk error.

No write permission.

Bad master directory block.

Unable to rename file.

External file system.

Not a Macintosh disk.

No such drive.

Volume already on-line.

Permission violation.

Volume off-line.

Error during GetFPos.

Invalid reference number.

Invalid parameter list.

File already open for writing.

Duplicate file name.

File busy.

Volume locked.

File locked.

Disk is write-protected.

File not found.

Too many files open.

Memory (system heap) full.

Attempt to position mark before end-of-file.

Attempt to read past the end-of-file.

File not open.

Bad name.

Disk I/O error.

No such volume.

Current directory is full.

Disk full.

Error reading the resource map.

Operation prohibited by resource attribute.

 RmveResource failed.

AddResource failed.

Resource file not found.

Resource not found.

Sorry, you will have to look it up!