Error Codes: OPR4ONWY:U9IM8TAC:OI2DL65P

The following error occurs in BI Answers in the dashboard.

Error:
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View Display Error
the server is unable to connect to the database.
Odbc driver returned an error (SQLExecDirectW).

Error Details:
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Error Codes: OPR4ONWY:U9IM8TAC:OI2DL65P

State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000] [nQSError: 10058] A general error has occurred. [nQSError: 43113] Message returned from OBIS. [nQSError: 17001] Oracle Error code: 12154, message: ORA-12154: TNS:could not resolve the connect identifier specified at OCI call OCIServerAttach. [nQSError: 17014] Could not connect to Oracle database. (HY000)
SQL Issued: SELECT 0 s_0, "MFANALYTICS"."DS_SBFS_MFAFIN_TBL"."BROKERCODE" s_1, SUM("MFANALYTICS"."DS_SBFS_MFAFIN_TBL"."CLS_UNITS") s_2 FROM "MFANALYTICS" WHERE (TOPN(SUM("DS_SBFS_MFAFIN_TBL"."CLS_UNITS"),10) <= 10) FETCH FIRST 65001 ROWS ONLY

Solution :
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Add the Database connectivity details in the tnsnames.ora file present in the OBIserver
Do tnsping if it is ok.
restart the BI services

C:/Oracle/ Middleware/ Oracle_BI1/network/admin/