Error showing in column desing regarding minimum size of column

As we are designing using code IS13920:2016, The program shows error column design               

 “  *** ERROR: MINIMUM DIMENSION OF COLUMN #  7153 SHOULD NOT BE LESS THAN (a) 20 TIMES THE DIAMETER OF THE LARGEST LONGITUDINAL REINFORCEMENTZ(b) BAR OF THE BEAM AT THE COLUMN JOINT AS PER CL 7.1.1 a) OF IS-13920:2016.”

 

While the column size I am providing is 320 mm (Minimum) which shall satisfy this clause as I have restricted the bar diameter in beam and column to 16mm. So 20*16 = 320 mm

 

Moreover I even checked changing column size to 400 mm (Minimum) Still this error is not gone. Kindly find attached input file for reference.

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