Cannot create a top-level child window + Referenced assembly 'C:\Windows\assembly\GAC_64\log4net\1.2.10.0__692fbea5521e1304\log4net.dll' targets a different processor than the application.

Dear Experts,

I have two issues.

I'm working in WPF browse application with framework 4.5 and using VB script as well as I'm using sap crystal report

1.  when I rebuilt project then I'm getting a Warning 

Warning 1 Referenced assembly 'C:\Windows\assembly\GAC_64\log4net\1.2.10.0__692fbea5521e1304\log4net.dll' targets a different processor than the application. Ocean

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2. is, I have create two report in crystal report in my WPF Application A. rptproductlist, B. rptHeader

I have insert rptHeader as subreport into rptproductlist in Report header section (Report is viewing fine)

after viewed the report when enter mouse or move mouse in subreport area then getting an error

Thanks & Regards Manoj Patel