ODBC Issue in Red Hat linux release 6.9: - qt

Question

ODBC Issue
The database reported an error: [unixODBC][Driver Manager]Data Source name not found, and no default driver specified
As shown as below, QT application trying to connect a database file of type DBF (.dbf), when we try to execute the application we got the above error.
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QODBC");
QString str("DRIVER={Microsoft dBase Driver (*.dbf)}; DBQ=/path/to/dbf/files");
db.setDatabaseName(str);
if(db.open())
{
...
}
else
{
...// Failure
}
Referred the link (https://www.easysoft.com/support/kb/kb01039.html) and followed the below steps:
The configuration files odbc.ini and odbcinst.ini are present with the appropriate content.
Exported the variables ODBCSYSINI, ODBCINSTINI and ODBCINI with /etc/odbc.ini, /etc/odbcinst.ini and /home/user/.odbc.ini
From the same shell where we have exported the variables, tried to execute the application however encountered with the error "The database reported an error: [unixODBC][Driver Manager]Data Source name not found, and no default driver specified
Please find the content of the odbc.ini and odbcinst.ini
odbc.ini file:
[ODBC Data Sources]
TestODBC=MyODBCDriver
[TestODBC]
Driver=path/to/driver file
DataDirectory=path/to/where my dbf files resides
[Default]
Driver=path/to/driverfile
DataDirectory=path/to/where my dbf files resides
odbcinst.ini file:
[ODBC Drivers]
MyODBCDRIVER=Installed
[MyODBCDriver]
Description=ODBC Driver
Driver=/path/to Driver file
[ODBC]
Trace = Yes
Please provide any suggestion or solution to resolve the issue