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Software locks and the parallel port

I have 2 DOS programmes that have to access a Software lock
(dongle) in the parallel port on my P90 Win95 system.  They used to run fine until I loaded MSExchange which I now need.
The problem is that my system no longer allows the reading of the locks.  How do I overcome this problem?
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naveng9
Asked:
naveng9
1 Solution
 
andyb013197Commented:
What error messages do you get from your DOS programs?

Have you conclusively proved that MSExchange is the culprit? (i.e. by uninstalling MSExchange temporarily)
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naveng9Author Commented:
One DOS prog' reports 'invalid lock' and the other just refuses to run with no error message.

I have not conclusively proved the culprit to be MSExchange by uninstalling but installing MSExchange on a similar system ended with the same result.  Unfortunately Exchange is use 4 times a day keeping my databases in sync' with my head office; I'm loathe to uninstall it.
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doncCommented:
Try commenting out lpt.vxd in system.ini (or any names like that).
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