http://tcllib.sourceforge.net/doc/tie.html ---- Array persistence. This package provides a framework for the creation of persistent Tcl array variables. It is also generic enough to allow the distribution of the contents of Tcl arrays over multiple threads and processes, i.e. communication. Persistence and communication are accomplished by tying a Tcl array variable to a data source. Examples of data sources are other Tcl arrays and files. [CMcC] 20050303 - I've written a [Metakit backend for tie] [RLH] 20050901 - When would this be included in tcllib? With the next 8.4 release? [AK] This can go into the example area. ---- Am I using tie correctly? The following script: package require tie set a(y) 1 set a(z) 3 tie::tie a file a.save set a(aa) 2 set a(ab) 3 set a(ac) 4 Gives me an error: can't set "a(ab)": can't unset "cache": no such variable while executing "set a(ab) 3" ---- [Category Interprocess Communication] | [Category Package]