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RapidDriver Frequently Asked Questions (F.A.Q.)
What is the difference between RapidDriver editions?
What is the difference between the various licenses?
Some RapidDriver functionality does not work!
Can not install RapidDriver package!
I can not open the driver in my application.
Error message 'RapidDrv.sys driver cannot be opened.'
How do I run RapidDriver under Windows 95 or Windows NT 4.0?
What programming languages does RapidDriver support?
I can not open the driver in my application.
Go to RapidDriver Main Page

The correct answer might depend upon several things according to the RapidDriver Edition.

RapidDriver Demo Version

·The evaluation period for this installation of RapidDriver has expired.  
·You must keep RapidDriver application running to evaluate the RapidDriver Developer functionality.  
·The driver was not installed. Make sure that your device appears under the RapidDriver Devices class (*) branch of Device Manager and has no problems.  

RapidDriver Explorer

You can not create any application with RapidDriver Explorer. You should upgrade your RapidDriver license to the either of Developer or Source Builder editions.  
 
RapidDriver Developer or RapidDriver Source Builder

·You should install the "bus-specific" driver (RapidIsa.sys, RapidPci.sys, RapidUsb.sys, or RapidLpt.sys) instead of "universal" RapidDriver.sys.  
·Make sure that appropriate DLL exist in <Windows>\System directory and appropriate driver exist in <Windows>\System32\Driver directory.  
·The driver was not installed. Make sure that your device appears under the RapidDriver Devices (*) class branch of Device Manager and has no problems.  
·Wrong "instance number" in OpenRapidXXX() function.  

(*) RapidDriver Devices are marked by the RapidDriver icon in Device Manager, see picture:

rapiddriverclassbranch