Draw a line on a CWImaqViewer durinq a continuos aCquisition

[michele.valentini]

Can I Draw a line on a CWImaqViewer during a Continuos Acquisition. I Retrieve even the same error:"the object has been locked by an ongoing acquisition and may not be modified"

[ambu]

Hi,
I'm using NI-IMAQ 2.6.1, Vision 6.1 and a PCI-1407.
I ran the following example installed from the driver:
C:\Program Files\National Instruments\NI-IMAQ\Sample\VB\Grab
and everything worked fine, so I was able to draw lines during the acquisition.
Try with this example to debug your issue.
Regards
AlbertoA

[michele.valentini]

Hi,
Thank you for your reprly.
But if I try to draw a line by code for example CwImaqViewer.images.overlay(1).Drawline(..) the error occurs.
Please help me!!

Bye

[ambu]

Hi,
you have duplicate the memory (the image) in which you save the images acquired from the board. Then you can manage the copied buffer (image) with the vision functions (overlay functions you you case).
Regards
AlbertoA