How to read current command prompt value

I know this is asked once in a while, but it never seems to be answered in a
satisfactory way (which, of course, could be an answer all in itself). I
need to obtain the string currently being displayed as the command prompt
when AutoCAD is NOT idle (or "quiescent").

I have a batch plotting process that plots drawings dropped in a watched
directory, and it controls AutoCAD via commands sent with SendCommand(). If
the drawing loads fine and there are no problems, the command sequence works
out fine and everything is peachy. If however anything goes wrong, like a
drawing contains fonts that aren't installed and AutoCAD promts the user for
input, this disrupts the whole process. If any given command doesn't
complete normally, with AutoCAD prompting the user for some input, I want to
log this prompt to an error file, kill the session, and move on to the next
drawing.

I can detect whether AutoCAD is not idle after a command by checking
IsQuiescent, but I can't figure out how to obtain the prompt string being
displayed to the user. When AutoCAD is idle, you can use GetVariable() with
"lastprompt" or "cmdnames", but when it's not idle, those won't work. What
other options do I have?

Thanks!

Uwe W. Radu

 

I'm not sure if this will work in your particular situation, but I have put the following code into my project when I've received an unexpected result from a SendCommand.


    DoEvents     ThisDrawing.SendCommand "copyhist" & vbCr

This copies the entire command history to the Windows Clipboard. In my case that's all I have the program do and I open the clipboard manually to examine what happened, but if you wanted to get fancy you could use the Clipboard.GetText method to...
  
Oh. I was just checking that out and discovered that although the Clipboard object is available in VB6, for some reason it's not available in my AutoCAD 2002's VBA6! Well, perhaps you could still make some use of this by using the Shell function to run something external and using the SendKeys statement to make it paste the text. It would make it harder to just get the last line (containing the error message) though.
  
Regards
  
Wayne Ivory
IT Analayst Programmer
Wespine Industries Pty Ltd

 

ThisDrawing.SendCommand "copyhist" & vbCr

Thanks for the suggestion, this is an extra command that I now know.
Accessing the clipboard isn't a problem, since this is a stand-alone VB app
that controls AutoCAD externally via automation. The problem is that by the
time I know that a command hasn't returned (and most likely led to some sort
of prompt), it is too late to send the "copyhist" command to AutoCAD, since
it doesn't accept commands when not quiescent. The logic goes like this:

SendCommand()
' since most commands execute synchronously, AutoCAD should be
' idle again when returning from the call
if not Quiescent then
' something went wrong--obtain command prompt to see what
' AutoCAD wants and to log it to error file
' --at this point you can't execute any SendCommand statements
' because AutoCAD isn't idle
end if

Anyway, "copyhist" might still come in handy at some point. Thanks!

Uwe W. Radu

 

Uwe

How about document's Begin-/EndCommand events?

Cheers