Retention time locking error

Question

Hi! 
 The acquire RTLock Calibration Data is done with a mixture standard. However, after choosing one peak that I need to lock the retention time, it appears a message "peak number must be >0 and < number of peaks". How could I fix the error and then it can go to the next step. 
 Thank you.

Quek · Accepted Answer

Hi hycwongk , when you integrate the peak, try to make sure the baseline (red color line) is below the peak. Try to integrate other peaks, do you still get the same error?

Retention time locking error

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