I have created an .mst to allow me to amend a products .msi. I have changed the relevant codes and setup the upgrade table with the correct upgrade code. I originally had it set with the max version as the latest version code and with attribute code of 256. I tested that it upgraded the old version on my test machine and everything worked fine so I have released it via SMS to about 24 pcs. It has worked fine on half of them but it has failed on the other half. The error SMS gives me for the failure is that "Another version of this product is already installed". I have since tried it with various attribute codes (0, 256,512,756) and also only with min version specified but nothing works. I don't know whyit worked for half of them but not the rest.
Can anyone tell me what the correct attribute code should be as I cant seem to find a proper answer anywhere. Also, should I enter the max or min versions or both of them? The old version is 6.2.1295 and the new one is 6.2.1582. I have had a look on a failed pc and they have version 6.2.1295 installed. I dont fancy having to go round and do a manual uninstall and install on these pc's so can someone offer me some advice?
Thanks in advance :)
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