I got an error saying that” FRF-00007 unable to open RFC connection” while installing SAP ECC 6.0 Service Release 2 with ides. Then i read some articles and solutions wrote by other senior sap basis administrators and solved the problem by following steps suggested by them.
1. Start sap management console
2.Log-in to sap system
3. Type transaction codeSM59
4. Expand TCP/IP connections
5. Double click on SAPXPG_DBDEST_PSWDF025
6. Click Technical Settings Tab
7. Click Ctrl + F1 to display and change host name
4. Change Target host to your sap system name, you should get IP address of your sap server automatically
5. You can test this by clicking ‘connection test’ tab from the same
6. You should get the results without errors
7. Now you can retry the operation in installation screen of SAP ECC 6.0 SR2
Ask me any further clarification on this error. I will try to help you.