One shot & continuous samples trouble in VB.NET

[AINIA]

Hello,

I am using VB.NET 2003 with MS 8.0 ,

I have modified a National Instruments example in order to acquire one shot or continuous samples depending on the pressed button.I take one sample (from one of each three channels I have configured), then I pressed Continuous button in order to acquire in continuous mode and then if I stop the program with the stop button I get this error : Status code -200088. The click event for the stop button only checks if there's a task running and then disposed it. My problem is that everything goes well except when I disposed the continuous task.

I know it may be a stupid problem for an experienced programmer, so I attached my code hoping that someone can help me.

Thank's in advance.

Regards.

[Javier_Gutierrez]

Hi AINIA

   I've succesfully reproduce your error. What are you trying to accomplish? It seems you are reading 100 samples at a rate of 1000 samples per second, but you are only displaying the last one.

  The error seems to be produced because you are trying to close a task that is already closed. In order to do continous acquistion, try this link

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=C60E158A108C26A7E034080020E74861&p_node=174961

  There is also an on-line tutorial that uses USB-DAQ, but applies to your case

http://zone.ni.com/devzone/conceptd.nsf/webmain/C1EA00A64C9948BC86256FE800698BC3

Hope this helps

Javier Gutiérrez
NI Aplication Engineering