HELP: Reading from a parallel port: Capability Not supported error

[April H]

Hi,
I have read many of the comments on the developer zone addressing this issue, but I still have not been able to resolve the problem. I need to access the 5 data lines on my parallel port, to read one bit from each, they will be sent from a parallel port on another computer. I am using Windows 2000, Labview 6. When I use the In port.Vi I get an error that reads Capability not supported, VI was stopped at node 0x1D8 of subvi "In Port.vi". Does anybody have any thougts, or a vi that would work for this very simple application. I really just need five bits. Thanks!

[Helmut Hullen]

Hallo, April,

Du (x) meintest am 31.07.01 zum Thema HELP: Reading from a parallel port: Capability Not supported error:

> computer. I am using Windows 2000, Labview 6. When I use the In

Maybe you need "hwaccess.xxx" or "accesshw.xxx" from the NI server.

Windows NT and Windows 2000 don't allow direct port access without this
packet.

Viele Gruesse!
Helmut

[Ben]

Hi April,

Not all parallel port are created equal. I am drawing a blank on the term (maybe EPP Enhanced Parallel Port), but you need a port that is bi-directional.

Have you tried an external zip drive or something similar on the port?

I hope this helps,

Ben

[eh]

You need a special driver for NT. Here is a link to knowledgeBase on this subject and links to the driver.

http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/62790c9621f599cf8625659f0068e6e9?OpenDocument