This error message is typically generated when an incompatible printer driver is set as the default.

This information was provided by Claris Corporation on 16 March 1998, and incorporated into Apple Computer's Tech Info Library.

If you receive an "Illegal Operation" or Exception error 10H message from Windows 95 when performing routine tasks in ClarisWorks 4.0 or 5.0, or FileMaker Pro 3.0 or 4.0, such as installing the application, running an Assistant or opening a file, there are several things that you can do to try to eliminate this error.

If you receive the "Illegal Operation" error click on the DETAILS button. If you get a message similar to the following:

"CLWORKS caused an exception 10H in module CLWORKS.EXE at XXXX:004dc6ef"
"FMPRO caused an exception 10H in module FMPRO.EXE at XXXX:004dc6ef"

(The XXXX seems to vary depending on the operation preformed but the rest of it seems to remain pretty constant.)

You may have an incompatibility between your application and your printer driver.

We have found this particularly to be the case the following printer drivers:

Canon BubbleJet BJC-70 (NOTE: The Windows 95 BJC-70 driver does not cause this error message.)
Canon BubbleJet BJ-210
Canon BJC-610
Canon BJC-4000 Windows 3.1 driver version 1.0d/3.1
Canon BJ-200EX
Canon BJC-4100
Canon BJC-4200
Eclipse Fax driver
Hewlett-Packard (HP) DeskJet 660
Hewlett-Packard (HP) DeskJet 660c driver versions prior to 8.0
Hewlett-Packard (HP) LaserJet 5L
Hewlett-Packard (HP) LaserJet 5P/5MP
Generic/Text Only
MidiComm Fax Driver by MidiSoft
Cheyenne Bit-Fax
Epson Color Stylus

If you are getting this error message, the printer driver you are using should not be set as the default printer when the application. Setting another printer as the default printer and then switching to your specific driver using PRINT SETUP may get you around the problem, but it may crash the system also.

Your best option is to print to another printer or use a compatible printer driver such as the 5P driver or download the updated driver from HP, in the case of the HP LaserJet 5L. For Cannon BubbleJet Printers try the IBM ProPrinter drivers (this does work for the BJ 200EX). Often times compatible drivers will be listed in the printer manual.

Contact your printer manufacturer to see if an updated printer driver is available also.

If changing the printer driver to a compatible driver does not stop the crashing problem, you may try turning off the Math coprocessor. To do this follow these directions:

1. With your right mouse button, click My Computer, and then click Properties.

2. On the Device Manager tab, click View devices by type.

3. Double-click System Devices.

4. Click Numeric Data processor, and then click Properties.

NOTE: With a Plug and Play bios, the Numeric Data Processor option will be under a Plug and Play branch in the Device Manager rather than at the top level.

5. On the Settings tab, click Never Use The Numeric Data Processor.

6. Click OK.

7. Restart your computer.

If you are still having problems, make sure that your temp variable is set correctly. To do this, follow these directions:

1. Click the Start button, point to Programs, and then click MS-DOS Prompt.

2. Type the following and press ENTER:

set

3. Note the directory specified by the TEMP= line.

4. Attempt to access that directory. Type the following at the MS-DOS prompt and press ENTER

cd\<temp>

where <temp> is the path specified in step 3.

5. If you receive the following error message,

Invalid directory

type the following at the MS-DOS command prompt and press ENTER:


md <temp>

If you do not receive an error message, clear the temp directory of temporary files. Type the following at the MS-DOS and press ENTER:



del *.tmp

6. Type the following at the MS-DOS prompt and press ENTER:

exit