# Router Error Codes > **NOTE** > > This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md). ## 100001 Internal Error **Error Message** Internal error. **Description** This error code is reported when an internal error that cannot be rectified by developers occurs. The internal error type is included in the error information. **Possible Causes** The operation for obtaining the rendering engine or parsing parameters fails. **Solution** NA ## 100002 Incorrect URI **Error Message** Uri error. The uri of router is not exist. **Description** This error code is reported when the URI of the page to redirect is incorrect or does not exist. **Possible Causes** The entered URI is incorrect or does not exist. **Solution** Ensure that the URI is correct. ## 100003 Too Many Pages Are Pushed into the Page Stack **Error Message** Page stack error. The pages are pushed too much. **Description** This error code is reported when more than 32 pages are pushed into the page stack. **Possible Causes** Too many pages are pushed. **Solution** Delete unnecessary or invalid pages. ## 200002 Incorrect URI **Error Message** Uri error. The uri of router is not exist. **Description** This error code is reported when the URI of the page to be used for replacement is incorrect or does not exist. **Possible Causes** The entered URI is incorrect or does not exist. **Solution** Ensure that the URI is correct.