Failed to create form. Please check the form attributes

Dear Expert,

I privation to make a UI successful SAP B1(SAP Business One 10.0 (10.00.240) SP 2402  (64-bit)) but encountered an mistake saying, 'Failed to make form. Please cheque the signifier attributes.' I've initially checked the attributes arsenic shown successful the attached representation and didn't find thing wrong. How bash I hole this, immoderate ideas? 

Best Regards.