I am writing an installer to install data to a different, user-defined location than the application code.  The "App Code" feature is being installed to TARGETDIR, and "App Data" is being installed to DATA_DIR.  The dialogs, installation and uninstallation are working, almost.  The problem is at the end of the uninstall process (OnMaintUIAfter), I need to call my custom function RemoveEmptyFolders(/*string*/ path, /* bool */ removeRoot) which recursively deletes all empty folders from the data directory, including the root folder, if removeRoot = TRUE.   At this point, RemoveEmptyFolders() does not know DATA_DIR  on uninstall, but it remembers TARGETDIR. I declared DATA_DIR as a global STRING variable.  Data components are defined to install at <DATA_DIR>\whatever_subfolder, and they are associated with the "App Data" feature.  FeatureSetTarget("App Data",  "<DATA_DIR>", path) worked to get the feature and all its components to install to the correct place. On uninstall, all files are successfully removed from both TARGETDIR and DATA_DIR.  However there are a bunch of empty folders left over inside the DATA_DIR folder.  So RemoveEmptyFolders() didn't work for that location.  It worked for TARGETDIR, so it's not the function itself. Debug messages reveal that InstallShield has no idea what DATA_DIR is at uninstall time.  RemoveEmptyFolders() started trying to traverse paths I've never even seen before, that start with .\whateverfolder.  Yikes.  I put in a check to make sure the path != "", so at least it won't do that anymore. How did InstallShield know where to uninstall the "App Data" files from?  How can I grab that path value at uninstall time, so I can pass it to my function and delete empty folders?  If the DATA_DIR value is not in the log, then what IS in the log that tells InstallShield where to uninstall the "App Data" files? ... View more

Trying to post this again, because my previous post got marked as spam for some reason? I'm experiencing the following behavior with my prerequisite, but not when the Visual C++ 2019 installer is run outside of InstallShield.  My colleague and I both experience the following repeatable behavior. When Visual C++ 2017 (x64) redistributables are installed, the InstallShield installer fails after installing Visual C++ 2015-2019 (x64) redistributables. When Visual C++ 2017 (x64) redistributables are not installed, it succeeds through both prerequisites and the main installer. Since Visual C++ 2015-2019 (x64) replaces the Visual C++ 2017 (x64) redistributables, to reproduce the issue, you must uninstall Visual C++ 2015-2019 (x64), and reinstall Visual C++ 2017 (x64). I've created a version of the prerequisite that logs the installation of Visual C++, and got the attached logs. Screenshots of my prerequisite configuration are also attached. If anyone has any idea what is wrong, please help! I'd like this to work, and this installer must be delivered very soon! ... View more

I was asked to write an installer that will allow the user to install data in a different location than the software.  So I'm trying to check the user's chosen path to make sure there is enough space there.  For some reason the following code produces an error on the "ConvertSizeToUnits" line, stating "numeric variable required," error code C8046.  Does anyone have a working example of this?  Can you see anything wrong?  I've tried this with and without assigning variables to hold the result of the FeatureGetCostEx and ConvertSizeToUnits functions.  I hope this has a simple answer. Dlg_SdAskDestPath_data: szTitle = "Choose Data Folder"; szMsg = "Choose where to install data for %P."; //Initialize directories to DATA_DIR global variable, which is basically C:\\Users\\Public\\myapp_data svDataDir = DATA_DIR; nDataDirResult = SdAskDestPath(szTitle, szMsg, svDataDir, 0); if (nDataDirResult = BACK) then goto Dlg_SetupType2; else // Check disk space at the data destination path nDataSpace = GetDiskSpaceEx (svDataDir, MBYTES); //nDataSpaceReq = FeatureGetCostEx (MEDIA, "Data Files", svDataDir, nvCostHigh, nvCostLow); FeatureGetCostEx (MEDIA, "Data Files", svDataDir, nvCostHigh, nvCostLow); nConv = ConvertSizeToUnits (nvCostHigh, nvCostLow, BYTES, nvCostMBHigh, nvCostMBLow, MBYTES); // ---> Error flags this line nDataSpaceReqMB = nvCostMBHigh + nvCostMBLow; if (nDataSpaceReqMB > nDataSpace) then MessageBox(svDataDir + " does not have enough space to install Data Files. Please choose a different location with at least " + nDataSpaceReq + " MB free." , SEVERE); goto Dlg_SdAskDestPath_data; endif; // If it gets this far, it passes the tests, so DATA_DIR = svDataDir; endif;        ... View more