MySQL ERROR : column EnquiryNo cannot be null

i have a stored procedure in Mysql while i execute the procedure i get this error even am having the values in the query.

CALL sptblEnquiryMaster ('Offer/0011/2013-2014','demo/001','2014','1','1','0','1','1','1','jkn','jkn','nn','1',
'1','ADD','hjbj',@PMasterSID)

ERROR : column 'EnquiryNo ' cannot be null