1# Ads Service Framework Error Codes 2 3 4<!--RP1--> 5> **NOTE** 6> 7> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](../errorcode-universal.md). 8<!--RP1End--> 9 10## 21800001 Internal System Error 11 12<!--RP2--> **Error Message**<!--RP2End--> 13 14System internal error. 15 16 17<!--RP3--> 18**Description** 19 20This error code is reported if an internal system error occurs. 21<!--RP3End--> 22 23**Possible Causes** 24 25Failed to connect to the OAID service. 26 27**Procedure** 28 29Check whether the service is running properly. 30 31 32## 21800003 Ad Loading Failure 33 34**Error Message** 35 36Failed to load the ad request. 37 38**Description** 39 40This error code is reported if loading the ad fails. 41 42**Possible Causes** 43 44The network connection is abnormal, or an ad request parameter is incorrect. 45 46**Procedure** 47 48Check the network status, and correct the ad request parameters. 49 50 51## 21800004 Ad Display Failure 52 53**Error Message** 54 55Failed to display the ad. 56 57**Description** 58 59This error code is reported if displaying the ad fails. 60 61**Possible Causes** 62 63The network connection is abnormal. 64 65**Procedure** 66 67Check the network status. 68 69 70## 401 Incorrect Ads Request Parameter 71 72**Error Message** 73 74Invalid input parameter. Possible causes:1. Mandatory parameters are left unspecified. 752.Incorrect parameter types. 3.Parameter verification failed 76 77**Description** 78 79This error code is reported if an ads request parameter is incorrect. 80 81**Possible Causes** 82 83Ads request parameters fail the verification. 84 85**Procedure** 86 87Check whether the ads request parameters are correct. 88 89 90## 801 Ad Request Failure 91 92**Error Message** 93 94Device not support 95 96**Description** 97 98This error code is reported when the device supports the target SysCap but does not support a specific API. 99 100**Possible Causes** 101 102The device does not support the API. 103 104**Procedure** 105 106Check whether the device supports the API. 107