Illegal Operation

[Lloyd Plantholt]

Can someone tell me why windows98 would issue the error
"illegal operation Performed" when running the attached program?
It compiles just fine....But will not run....Question- WHY???
$compile Exe
filin$ = command$
filein$ = mid$(filin$,1,8)
open filein$ for input as #1
open "lpt1" for output as #2
do while not eof(1)
line input #1, dta$
print #2, dta$
loop
END


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[Mel Bishop]

I tried it on my system and it works okay. However, I did have
to change PRINT #2,DTA$ to PRINT;DTA$ since I have a USB printer
attached and nothing to LPT1.

Do you know which line it's going burp on? If not, let's assume
it's the line I had to change. Make sure your printer is on, paper
loaded and it's on-line and ready to go.

On a personal note: Although it will work, I would not recommend
using DTA$ as a variable. That label is used in other aspects of
programming and the programmer may become confused.


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[Lance Edmonds]

LPT1 (without the colon) uses the BIOS to do the I/O, rather than PowerBASIC's own LPT handler.

However, there are a few things you can try:

1. Add $ERROR ALL ON to the code.

2. Add code to verify the filename exists before opening the file.

Beyond this, it could be almost anything. ie, no LPT1 port defined, or not captured. The O/S could be unstable (ie, do a reboot and retest), or something else, such as a TSR or another application could be causing problems.

Did you try the compiled code on more than one PC? Try compiling on more than one PC?

Finally, if your copy of PB.EXE is dated earlier than 19-12-97 (dd/mm/yy) then you should send an email to mailto:[email protected][email protected]</A> (with your serial number!) and request an update to that edition.

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Mark Hunter]

My PBDOS 3.5 is dated 16 Dec 97.



[This message has been edited by Mark Hunter (edited January 13, 2002).]

[Neil Hosgood]

Originally posted by Mel Bishop:
I tried it on my system and it works okay. However, I did have
to change PRINT #2,DTA$ to PRINT;DTA$ since I have a USB printer
attached and nothing to LPT1.

I take it that means one can print to a USB printer from PBdos ?
Damn, I must be behind the times



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[Lance Edmonds]

Neil: No, Mel means he disabled printing completely, in order to test the rest of the code.

Mark: Yes, you are 3 builds behind the current release.

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>