Error code -200088

[John28]

I have a problem with DAQmx  version 8.3 (aqusiston card PCI-6133). I try use this function (in Delphi 7) DAQmxCreateAIVoltageChan(...) and I get error -200088. Anybody can help me? Thanks you

[Jonathan_Brumley]

That error code means

"Task specified is invalid or does not exist". 

Did you remember to create a task before creating an AI channel?

 

[John28]

Thanks, I solve this problem. If you use delphi you should write as folowing:

.....

var Task :PLongint;  Error :Longint

begin

  //function DAQmxCreateTask(taskName:PChar; taskHandle:PLongint):Longint; stdcall;       from  nicaiu.dll  
  Error:=DAQmxCreateTask('Analog Input', Task);

 // and now you can create AI channel

......

but this  code not working, solution is very simple

.....

var Task,  Error :Longint

begin

  //function DAQmxCreateTask(taskName:PChar; taskHandle:PLongint):Longint; stdcall;       from  nicaiu.dll  
  Error:=DAQmxCreateTask('Analog Input', @Task);

 // and now you can create AI channel

DAQmxCreateAIVoltageChan(Task,'Dev1/ai1','P0', DAQmx_Val_Coupling1_DC,10,-10,DAQmx_Val_VoltageUnits1_Volts ,nil);

......