I believe it is the language key in registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ , InstallShield reads the language id. ... View more

Where is the RemoveExistingProducts sequenced in your installation? ... View more

Try changing the ProductVersion to 1.xx.000 instead of 1.00.001 ... View more

Is the 'Compare to File' option is not working from both the files? How about MsiPackageDiff? Is that working for the same files? ... View more

On which version of windows installer are you installing the patch? Is this happening every time you install the patch? And for the question on not able to uninstall the patch, check out this link . ... View more

U can set the condition in the Custom Action as "PATCH" This will make sure that the custom action is executed only on Patch installation. ... View more

Hi Amit, You haven't mentioned whether you have the Compressed or UnCompressed setup. If your installer is uncompressed, look for the setup.ini file. You can find the Key 'CmdLine' under the session '[Startup]'. Add the required property value in the command line. Hope this helps. ... View more

Are you sure the files that are not getting upgraded have the incremented file version? You have mentioned that you have the same Package, Product and Upgrade Codes. But for every release the package code needs to be changed. Change your package codes and try again. ... View more

Have a look at this thread: http://community.macrovision.com/showthread.php?t=181677 ... View more

Did you try using SETUPEXEDIR property? ... View more

Hi Vaneeth, Can You paste the screen shot of the Upgrades view in the Installshield. -VJ ... View more

Hi Vaneeth, It is impossible to do Upgrades if the UpgradeCode has changed. You say that you have two installer with different Upgrade Codes. So, you can't create a single installer targeting both the packages. "I have tried same upgrade code (as the previous upgrade installer) and different product code but i get two entries in the add/remove programs which i don't want" Did you populate the Upgrade table? ... View more

Hi Vaneeth, Look into the Major Upgrade Versioning Rules in this http://helpnet.acresso.com/Robo/BIN/Robo.dll?mgr=agm&tpc=%2Frobo%2Fprojects%2Finstallshield14helplib%2FMajorMinorSmall.htm&wnd=InstallShieldLivingHelp%7CMain&agt=wsm&ctxid=showthread.php Upgrade code should not be changed for ANY Upgrades. So, typically u should change the Product Code and not Upgrade Code. Hope this helps. -VJ ... View more

Hi, In the Release view, under Build tab, did you check the 'UI Langauges' section? Is it holding only English? -VJ ... View more

Hi, When I use Session.Property(" ") = "", its working fine. Hope this solves my problem. Thanks. ... View more