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In Tools | Options, Miscellaneous, Versioning tab, there is the 'mandatory' ability to select when local files will be purged: Local History: Keep Local History Files for [value] days. The user should be able to disable this feature with a "Save all local history files" option. Also, if you enter 99999999999999999999999999, the warning is "Must be a number". 99999999999999999999999999 is a number. Thanks.
two different problem: 1.) need option to keep files in LH forever -> enhancement 2.) too big numbers ( > 2^32) in "Keep LH Files for ..." cause an "Must be a number" error. -> filed a new issue #179833 to over this
fixed core-main #e3f418448d14
Integrated into 'main-golden' Changeset: http://hg.netbeans.org/main-golden/rev/e3f418448d14 User: Tomas Stupka <tstupka@netbeans.org> Log: Issue #179826 - Add ability to keep all Local History Files