An error occurred while evaluating the expression:

			tmp = attributes.SRC;
			tmp = attributes.SOC;
			reUser 	= "Win|Mac";
			aCli 	= refindnocase(reUser,cgi.http_user_agent,1,true);
			attributes.CLI = mid(cgi.http_user_agent,aCli.pos[1],aCli.len[1]);

Error near line 58, column 4.

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Parameter 2 of function Mid which is now "0" must be a positive integer