I have this error while loading a form where i added a new commandgroup and removed some commundbuttons

What did i miss ?

awHTMLgen error:

Method or procedure ccss_background(): error #107 ("Operator/operand type mismatch") at code line #14.077 ("case .T. AND this.lProp('BackStyle', m.toControl) AND .BackStyle = 0 && {fr} transparent")

call stack: 1_mobtest (32) > 2_awserverstart (142) > 3_awstart (105) > 4_mobtestserver.tmrfiletimer.timer (39) > 5_mobtestserver.processhit (561) > 6_mobtestserver.process (894) > 7_mobtestserver.routerequest (913) > 8_mobprocess.process (2689) > 9_wwprocess.process (272) > 10_mobprocess.domevent (4578) > 11_mobprocess.ajaxformrequest (4594) > 12_awajax.formrequest (8857) > 13_awajax.useraction (13619) > 14_awapphost.useraction (3246) > 15_awapphost.useraction_ (3433) > 16__form_bollettino_elenco._pageframe1.page2._commandbutton5.clickinet (29) > 17__form_bollettino_elenco._pageframe1.page2._commandbutton5.click (6) > 18__form_bollettino_elenco._pageframe1.page2._commandbutton5.buttonclick (3) > 19__form_bollettino_elenco.wform (54) > 20__form_bollettino_elenco.wformnoshow (75) > 21_awapphost.oform (2223) > 22_awapphost.formlaunch (2620) > 23_awapphost.formlaunch_ (2927) > 24_awapphost.cformhtml (1877) > 25_awhtmlgen.gethtml (1500) > 26_awhtmlgen.gethtml_ (1881) > 27_awhtmlgen.gethtml_cnt (2122) > 28_awhtmlgen.gethtml_cnt_members (2452) > 29_awhtmlgen.gethtml_member (2025) > 30_awhtmlgen.ocomandi.gethtml (1500) > 31_awhtmlgen.ocomandi.gethtml_ (1881) > 32_awhtmlgen.ocomandi.gethtml_cnt (2122) > 33_awhtmlgen.ocomandi.gethtml_cnt_members (2452) > 34_awhtmlgen.ocomandi.gethtml_member (2025) > 35_awhtmlgen.ocomandi.ocommand1.gethtml (1517)

In debug i saw that .BackStyle = 't'

awCmd.BackStyle emulates native .BackStyle

Please replace .BackStyle = 0 by Empty(.BackStyle)

Perfect. No errors. Seems to work. Thanks