[GRASS5] [bug #1078] (grass) grass5pre4 tcltk error under OS X

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this bug's URL: http://intevation.de/rt/webrt?serial_num=1078
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Subject: grass5pre4 tcltk error under OS X

Platform: other
grass obtained from: Trento Italy site
grass binary for platform: Downloaded precompiled Binaries
GRASS Version: 5.0pre4

when calling tcltk from within grass5, the following error message appears:

GRASS 5.0.0pre4 > Error in startup script: can't read "env(TCLTKGRASSBASE)": no such variable
    while executing
"source $env(TCLTKGRASSBASE)/main/menu.tcl
"
    (file "/usr/local/grass5/bin/tcltkgrass" line 22)

[1]    Exit 1                        tcltkgrass


This error did not exist with grass5pre2, but begun yet with grass5pre3. I encountered a similar bug report (#913) in the list, but it was not really resolved, as the user did not respond to a request of further information. 

I am looking forward for any advice,
many thanks, 

Guido Lorenz

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