I have an application that uses a generic text only printer driver to feed data in. Generally it all works as expected, but initially it doesn't. Here's the method and observed behaviour ...
1. On a virgin machine (2000/XP/Vista/7 seem to behave the same) install com0com.
2. Create a local port CNCA0
3. Create generic text only printer with port CNCA0
4. Open hyperterm and configure for CNCB0
5. Do a test print, nothing comes out. Using another hyperterm session on CNCA0 will confirm the connection works.
6. After some time, generally a day or two, the generic printer connection now works. It doesn't seem to be related to restarting the computer (and/or spooler).
I'm quite perplexed by it all. If anyone has any suggestions, I have the means to readily create 'virgin test machines' with VMWare to try to sort out where I'm coming unstuck.
Any and all help greatly appreciated.
Thanks
Terry
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Ah ... I see what is going on. There was a change in portname during my install process that caused things to behave oddly. The scrolling has caught me out in the past as well - I know hyperterm is often the source of problems, I've been using it for years and discovered a new one just last week. Thanks for your reply.
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Hi,
I have an application that uses a generic text only printer driver to feed data in. Generally it all works as expected, but initially it doesn't. Here's the method and observed behaviour ...
1. On a virgin machine (2000/XP/Vista/7 seem to behave the same) install com0com.
2. Create a local port CNCA0
3. Create generic text only printer with port CNCA0
4. Open hyperterm and configure for CNCB0
5. Do a test print, nothing comes out. Using another hyperterm session on CNCA0 will confirm the connection works.
6. After some time, generally a day or two, the generic printer connection now works. It doesn't seem to be related to restarting the computer (and/or spooler).
I'm quite perplexed by it all. If anyone has any suggestions, I have the means to readily create 'virgin test machines' with VMWare to try to sort out where I'm coming unstuck.
Any and all help greatly appreciated.
Thanks
Terry
I've done it on W2K w/o any problems.
The generic text only printer always adds empty page to the end.
So, did you scroll up hyperterm window to see the text?
Ah ... I see what is going on. There was a change in portname during my install process that caused things to behave oddly. The scrolling has caught me out in the past as well - I know hyperterm is often the source of problems, I've been using it for years and discovered a new one just last week. Thanks for your reply.