Error while calculating objective function: "Please load the corrected observed data and rerun this step"

[MOHAMMED SALIM S]

Currently I'm working on the hydrological modeling. i ran the model successfully, now i want to calibrate the model using RSWAT. I successfully completed steps  till RUN SWAT. I prepared observed data file as per the guidelines and there is no discontinuity in the data. When i want to do evaluate output in objective function i encounter one error. The snapshot of process and error is attached with this mail. Please suggest solution for this.