why purify tool shows an IPR error on the "throw true" statement?

Question

while doing an memory checkup with purifier, it is showing an IPR error on the following statement.

 throw true;

What could be the issue?

void Myfunc(char *p_trace_id,char *p_session_id,int &p_roam_flag)
{
   try
   {
      int set_id=0;

      if(0 == set_id)
         throw true;
   }

   catch(bool p_return_value)
   {
      if(!p_return_value)
      {
         g_Log.log(DEBUG, p_trace_id ,"[%s] %s<Line: %d> ", p_session_id ,__FUNCTION__,__LINE__);

         p_roam_flag = 0;
      }
   }
   catch(...)
   {
      g_Log.log(DEBUG, p_trace_id ,"[%s] %s<Line: %d> ", p_session_id ,__FUNCTION__,__LINE__);
   }
}

As per my analysis, there is issue in older version of purify. But i am using latest version.

Purify V7.0
Solaris V5.0