I've encountered the same error under different circumstances - maybe this will help someone. The project is InstallScript, upgraded from IS12 (and most prior versions back to IS5.5). Here's an excerpt from the build log: Calculating size of cabinet files... Copying uncompressed setup files... ISDEV : warning -7141: Error embedding file E:\TEMP\setup.exe into ?. File ? not found. Preprocessing data for data1.hdr... Somehow, the file "E:\TEMP\setup.exe" was marked read-only. Deleting it corrected the problem. - T
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