Improve error message handling in DataManager #302

Job	Run time
build-windows (windows)	4m 27s
build-windows (windows-x64)	4m 33s
build-macos (macos-15-arm)	1m 11s
build-macos (macos-13-universal-static-link)	5m 20s
build-macos (macos-13-intel)	2m 31s
build-linux (ubuntu-22)	1m 54s
build-linux (ubuntu-24)	2m 3s
build-linux (ubuntu-static-link)	2m 38s
	24m 37s

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