Getting following error in using cursor to fetch the records from alarge table in c language(current transaction is aborted, commands ignoreduntil end of transaction block)

Hi all,

Getting following error in using cursor to fetch the records from a large table in c language.

Can you please suggest why it is coming and what is the remedy for this.

Error Details

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Nov  1 13:21:54 sprintstd2 postgres[18604]: [10-1] < 2019-11-01 13:21:54.212 CET > ERROR:  current transaction is aborted, commands ignored until end of transaction block
Nov  1 13:21:54 sprintstd2 postgres[18604]: [10-2] < 2019-11-01 13:21:54.212 CET > STATEMENT:  BEGIN
Nov  1 13:21:54 sprintstd2 postgres[18604]: [11-1] < 2019-11-01 13:21:54.324 CET > ERROR:  current transaction is aborted, commands ignored until end of transaction block
Nov  1 13:21:54 sprintstd2 postgres[18604]: [11-2] < 2019-11-01 13:21:54.324 CET > STATEMENT:  BEGIN
Nov  1 13:21:54 sprintstd2 postgres[18604]: [12-1] < 2019-11-01 13:21:54.356 CET > ERROR:  current transaction is aborted, commands ignored until end of transaction block
Nov  1 13:21:54 sprintstd2 postgres[18604]: [12-2] < 2019-11-01 13:21:54.356 CET > STATEMENT:  BEGIN
Nov  1 13:21:54 sprintstd2 postgres[18604]: [13-1] < 2019-11-01 13:21:54.360 CET > ERROR:  current transaction is aborted, commands ignored until end of transaction block
Nov  1 13:21:54 sprintstd2 postgres[18604]: [13-2] < 2019-11-01 13:21:54.360 CET > STATEMENT

        theCursorDec = (RWCString)"DECLARE " +  mySqlCursor + " CURSOR FOR " + theSql;

        myFetchSql = "FETCH " + fetchStr + " IN " + mySqlCursor;

        // Begin the cursor

        PQexec(connection, ,"BEGIN"))

        PQexec(connection, ,"myFetchSql”)

        // Fetch records from the cursor. Getting First N tuples

        mySqlResultsPG = PQexec(connection,myFetchSql);

        if(PQresultStatus(mySqlResultsPG) == PGRES_TUPLES_OK)

        {

                myNumColumns = PQnfields(mySqlResultsPG);

                ntuples = PQntuples(mySqlResultsPG);

                myTotalNumberOfRowsInQueryResult = ntuples;

                myCurrentRowNum = 0 ;

        }

Regards

Tarkeshwar