Re: Re: Re: Error CS0433: The Type ‘ASP.xyz_ascx’ exists in both 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\xyyy\a155c787\191fc74e\App_Web_xkz3njia.dll' and 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET F

Hi,
Error CS0433: The Type ‘ASP.xyz_ascx’ exists in both 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\xyyy\a155c787\191fc74e\App_Web_xkz3njia.dll' and 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\ xyyy \a155c787\191fc74e\App_Web_orxdb2fq.dll'
Here the strange thing is this issue not coming on the development but it is coming only on the some of the testing environments.
What could be the reason please help?
Thanks,