Hello Julia,
-> I recommend to open the new thread with your information.
-> Case related to MaxDB 7.8 installation.
As of MaxDB 7.8 or higher) you will have an isolated installation with PrivateDataPath and Global program path ..
For documentation about the MaxDB software directories, see MAXDB 7.8 library or at:
http://help.sap.com/saphelp_nwce72/helpdata/en/44/c052555bb24612e10000000a11466f/frameset.htm
-> I recommend you NOT change the control.xml file to avoid further problems. The case should be checked but SAP support first. After the reason of the issue found & the analysis done, the MAXDB dev support could recommend the modification of control.xml installation file, often the SAP note created for this case as well.
And SAP solutions delivered to SAP customers via SAP notes, SAP messages, SAP patches.
What is your SAP message?
Regards, Natalia Khlopina