Error Codes in View and Data API

Sometime when you load a file in the viewer and it pops an alert that says "Load Error: 9". What does this mean?

If you look at the source code in version 1.2.21, at line 58240 (!!!) you can find the reasons for all the errors. The most common two are 4 (invalid token) and 9 (file isn't translated yet).

/**
 * 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

};