Oracle ODBC Drive Configuration error

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Unable to connectSQLstate=IM004[Microsoft][ODBC Driver Manager] Driver’s SQLAllocHandle on SQL_HANDLE_ENV failed   Solution(s): Check the system variable ORACLE_HOME, it should point to the installation folder of the Oracle client Check the system variable PATH, it should contain ;%ORACLE_HOME%\bin;. There is a . (dot) behind the ; sign in the PATH system environment variable.