Quantum Data 801GC, 801GF, 801GX Owner's And Programmer's Manual page 329

4008 Invalid delay time in sequence
A command file containing a sequence step delay was
downloaded to the generator.
Only use delay times (in seconds) that correspond to
the list of available delays.
4010 Font index out of range
You tried to use a font at an invalid index.
4020 No font present at given index
You tried to access a font at a valid index but the specified
index is empty because of a previous delete.
4030 Invalid font location
You tried to install a font that has not been transferred to
memory.
4576 Can't convert to inches, not valid units
The format unit (inches or millimeters) is unknown because
a new format was not initialized before it was created.
Conversion between the format's unit and the user's
preference fails.
Always use the FMTN command before editing a new
format.
4579 Can't convert to mm, not valid units
The format unit (inches or millimeters) is unknown because
a new format was not initialized before it was created.
Conversion between the format's unit and the user's
preference fails.
Always use the FMTN command before editing a new
format.
5002 No directory memory
This occurs during DIRN and NAMI commands when there's
an insufficient amount of managed memory for the buffer
request.
Save all used edit buffers and issue FMTN, IMGN,
and/or DIRN. This clears extra memory being used
by these buffers.
8-21