On the slave machine, the installation of a setup package is done via command line ("Windows batch command"). The installation is logged to C:\Freigabe\Installation\LOGS\LicenseServerSetup.log.
The installation starts the freshly installed servcie. That service creates a log file: C:\Freigabe\Installation\LOGS\LicenseServerServiceTrace.log
Both files do exist.
I want to archive the files instead of TYPE them to the console (that is a very bad workaround!).
In the section "Archive the artifacts", I entered C:\Freigabe\Installation\LOGS\License*.log
Jenkins insists that the files do not exist, "even C: does not exist" - obviously wrong. Consequently, no artifacts are archived at all.