The ipToAsciiProxy thread calls upon vendor libraries which may use significant amounts of stack. Account for this by providing the thread with an epicsThreadStackBig stack.

documentation/RELEASE_NOTES.html

@@ -30,6 +30,10 @@ either <tt>iocInit</tt> or <tt>iocBuild</tt> + <tt>iocRun</tt>) the
 stopping all scan activity.  The <tt>iocRun</tt> command restarts the IOC from
 this state.</p>
 
+<h4>ipToAsciiProxy</h4>
+
+<p>This thread calls upon vendor libraries which may use significant amounts of stack.  Account for this by providing the ipToAsciiProxy thread with an epicsThreadStackBig stack.</p>
+
 <p>While this might seem like a useful thing to be able to do, we have not
 tested it on IOCs using real-world I/O, and it is not unlikely that pausing an
 operational IOC could cause irremdial havok to any device support, sequence

src/libCom/misc/ipAddrToAsciiAsynchronous.cpp

@@ -164,7 +164,7 @@ ipAddrToAsciiEngine & ipAddrToAsciiEngine::allocate ()
 
 ipAddrToAsciiEnginePrivate::ipAddrToAsciiEnginePrivate () :
     thread ( *this, "ipToAsciiProxy",
-        epicsThreadGetStackSize(epicsThreadStackSmall),
+        epicsThreadGetStackSize(epicsThreadStackBig),
         epicsThreadPriorityLow ),
     pCurrent ( 0 ), cancelPendingCount ( 0u ), exitFlag ( false ),  
     callbackInProgress ( false )