Hi all I get this error 
 Error -200288 occurred at DAQmx Write 
 Possible reason(s): 
Attempted to write a  sample beyond the final sample generated. The generation has stopped,  therefore the sample specified by the combination of position and offset  will never be available.  
Specify a position and offset which  selects a sample up to, but not beyond, the final sample generated. The  final sample generated can be determined by querying the total samples  generated after a generation has stopped. 
Attempted to Write  Sample: 5001 
Property: RelativeTo 
Corresponding Value: Current  Write Position 
Property: Offset 
Corresponding Value: 0 
Task  Name: Output 
 whe i write the second time a wafeform to the analog output 
 How can I fix this problem ? 
 Any help 
 Jürgen 
 PS 
 LabVIEW 2009 SP1