asp.net - Unable to cast object of type 'masterpage' to type 'master' -


im getting error, rare cases, not able trace wrong going? error msg: "unable cast object of type 'asp.femaster_master' type 'femaster'."

the same page happens work fine when reupload via ftp, looks strage

please on this.

if have masterpage called femaster_master try exclude 1 project should able see (incorrectly) referenced.


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