b26 unminify version causes an error while rendering

I just recently upgraded to build26 and my application seems to be running fine with the minify version of Cesium. However, when I switch to the unminify version, my application will run for about 10 seconds after all my generated CZMLs have been sent to the browser via websocket before this error is generated:

An error occurred while rendering. Rendering has stopped.
DeveloperError: show is required. DeveloperError@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:528 ShowGeometryInstanceAttribute.toValue@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:42084 Batch.update@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:76784 StaticGeometryPerMaterialBatch.update@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:76858 GeometryVisualizer.update@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:77286 DataSourceDisplay.update@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:79030 Viewer/<@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:128230 Event.raiseEvent@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:20277 Clock.tick@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:22498 CesiumWidget.render@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:124792 Viewer.render@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:128807 render@http://localhost:8080/CesiumDemo/Cesium/Cesium.js:128075

I did check the show parameter of the last CZML that got sent, and it appears to be correct. It is working using the minify version of build26.

This did not happen when I used the unminify version in build25.

Please advise.

Thank you.

The unminified version has additional error checking that is pragma’d out in the minified version. It’s possible that you have an error that subtley works without the extra checking. Can you share some CZML that reproduces the problem?