Here is a list of BIM360 Error messages related to the viewer
/**
* Error code constants
*
* These constants will be used in onErrorCallbacks.
*
* @enum {number}
* @readonly
*/
Autodesk.Viewing.ErrorCodes = {
/** An unknown failure has occurred. */
UNKNOWN_FAILURE: 1,
/** Bad data (corrupted or malformed) was encountered. */
BAD_DATA: 2,
/** A network failure was encountered. */
NETWORK_FAILURE: 3,
/** Access was denied to a network resource (HTTP 403) */
NETWORK_ACCESS_DENIED: 4,
/** A network resource could not be found (HTTP 404) */
NETWORK_FILE_NOT_FOUND: 5,
/** A server error was returned when accessing a network resource (HTTP 5xx) */
NETWORK_SERVER_ERROR: 6,
/** An unhandled response code was returned when accessing a network resource (HTTP 'everything else') */
NETWORK_UNHANDLED_RESPONSE_CODE: 7,
/** Browser error: webGL is not supported by the current browser */
BROWSER_WEBGL_NOT_SUPPORTED: 8,
/** There is nothing viewable in the fetched document */
BAD_DATA_NO_VIEWABLE_CONTENT: 9,
/** Browser error: webGL is supported, but not enabled */
BROWSER_WEBGL_DISABLED: 10,
/** Collaboration server error */
RTC_ERROR: 11
};