| Hi, 
 I am seeing the below issue in a customer environment (7.5.2) after deploying some minor changes. 
 This occurs when trying to schedule a phone call within the web client from an Account or Contact. If we try to schedule a phone call from the welcome screen, the form opens but several of the controls are duplicated. 
 Anyone have any ideas as to the cause of this, what steps I should take next to resolve? 
 Thanks, 
 Lee 
   
 -- ERROR MESSAGE -- 
 Unhandled exception occurred during async postback. 
 System.ArgumentNullException: Value cannot be null. 
 Parameter name: input 
    at System.Text.RegularExpressions.Regex.IsMatch(String input) 
    at System.Text.RegularExpressions.Regex.IsMatch(String input, String pattern, RegexOptions options) 
    at Sage.SalesLogix.Web.Controls.Lookup.LookupControl.ClientConfiguration.From(LookupControl control) 
    at Sage.SalesLogix.Web.Controls.Lookup.LookupControl.CreatePartialPostbackClientScript() 
    at Sage.SalesLogix.Web.Controls.Lookup.LookupControl.OnPreRender(EventArgs e) 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Control.PreRenderRecursiveInternal() 
    at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) |