Out of Sketch Subscribe Memory Error - Stops Shadow Updates

Question

I am running an Arduino sketch that communicates with AWS through the IoT Core Service.  It is using this SDK:  
  
https://github.com/aws/aws-iot-device-sdk-arduino-yun  
  
In the sketch, I am pushing a fluid volume variable to a Thing Shadow using a thing called Volume.   **Everything works well for the first 14 shadow updates then I get an error.**   Here is a condensed version of the log:    
  
AWS IoT SDK Version(dev) 2.2.0-  
  
LOG command: setup completed.  
LOG command: config completed.  
LOG command: connect completed.  
LOG command: shadow init completed.  
LOG command: register thing shadow delta function completed.  
Resistance: 1553.95 ohms  
Calculated volume: 1421.46923  
LOG command: shadow update completed.  
Resistance: 1569.67 ohms  
Calculated volume: 1375.88024  
ERR command: shadow update code: -4  
  
From the SDK, here is a error description for -4:   **OUT_OF_SKETCH_SUBSCRIBE_MEMORY if the number of current subscribe exceeds the configured number in aws_iot_config_SDK.h.**  
That variable is currently set to 15 in my config file.   #define MAX_SUB 15  
  
How can I prevent this error from stopping my shadow updates?  
  
Thanks,  
  
Steve

Answer

Solved.

Answer

Problem has stopped happening after adding this code to the sketch:  
if(myClient.yield()) {  
      Serial.println("Yield failed.");  
    }

Out of Sketch Subscribe Memory Error - Stops Shadow Updates

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