Dear Experts

When I run a form, this error message appears.

Fatal error: Exception code=C0000005 @ 26-12-2006 14:20:49. Error log file: C:\Program Files\Common Files\Microsoft Shared\VFP\vfp9rerr.log
	Called from -  input.init line 181  {d:\ginscale\forms\fwtn30.sct d:\ginscale\forms\fwtn30.sct}
	Called from -  form3.command2.click line 1  {d:\ginscale\forms\menfrm.sct d:\ginscale\forms\menfrm.sct}
	Called from -  form3.command2.cmdhide.keypress line 9  {d:\ginscale\classes\xpwizard.vct d:\ginscale\classes\xpwizard.vct}
	Called from -  bism1 line 6  {D:\GinScale\progs\bism1.prg bism1.fxp}
	Called from -  scale line 107  {D:\GinScale\progs\scale.prg d:\ginscale\ginning.exe}

For what this is happend.

Please help