1e41f4b71Sopenharmony_ci# Screen Hopping Error Codes (To Be Deprecated) 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci> **NOTE** 4e41f4b71Sopenharmony_ci> 5e41f4b71Sopenharmony_ci> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](../errorcode-universal.md). 6e41f4b71Sopenharmony_ci 7e41f4b71Sopenharmony_ci## 4400001 Incorrect Target Device Descriptor 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci**Error Message** 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ciIncorrect descriptor for the target device. 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci**Description** 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ciThis error code is reported if an invalid device descriptor is passed to the screen hopping API. 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci**Possible Causes** 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci1. The target device does not exist, or the device is not networked. 20e41f4b71Sopenharmony_ci2. The target device descriptor is empty. 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ci**Procedure** 23e41f4b71Sopenharmony_ci 24e41f4b71Sopenharmony_ci1. Check whether the target device for screen hopping is correctly networked with the local device. 25e41f4b71Sopenharmony_ci2. Set the target device descriptor correctly. 26e41f4b71Sopenharmony_ci 27e41f4b71Sopenharmony_ci## 4400002 Input Device Operation Failed 28e41f4b71Sopenharmony_ci 29e41f4b71Sopenharmony_ci**Error Message** 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ciFailed to operate the input device. 32e41f4b71Sopenharmony_ci 33e41f4b71Sopenharmony_ci**Description** 34e41f4b71Sopenharmony_ci 35e41f4b71Sopenharmony_ciThis error code is reported if the screen hopping status is abnormal when the screen hopping API is called. 36e41f4b71Sopenharmony_ci 37e41f4b71Sopenharmony_ci**Possible Causes** 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci1. When screen hopping is initiated, the local device is in the hopped state. 40e41f4b71Sopenharmony_ci2. When screen hopping is disabled, the local device is in the free state. 41e41f4b71Sopenharmony_ci3. When screen hopping is disabled, the local device is in the hopping state. 42e41f4b71Sopenharmony_ci 43e41f4b71Sopenharmony_ci**Procedure** 44e41f4b71Sopenharmony_ci 45e41f4b71Sopenharmony_ci1. When initiating screen hopping, make sure that the local device is not in the hopped state. 46e41f4b71Sopenharmony_ci2. When disabling screen hopping, make sure that the local device is not in the free state. 47e41f4b71Sopenharmony_ci3. When disabling screen hopping, make sure that the local device is not in the hopping state. 48