[xcrysden] Xcrysen 1.5.60 Mac GLX issues

[Vruwink, Timothy Roger]

Hi -

I built Xcrysden 1.5.60 successfully, but am having problems running it.
If I ssh over to the server I have it loaded, with X forwarding enabled and type xcrysden &
I see XQuartz start to load, but then get the following error:

Package ImageMagick's convert: /usr/bin/convert
Package ImageMagick's import: /usr/bin/import
Package Xwd: /usr/bin/xwd
Executing: /software/xcrysden-1.5.60/lib/xcrysden-1.5.60/ftnunit
X Error of failed request: BadWindow (invalid Window parameter)
    Major opcode of failed request: 3
    ResourceID in failed request: 0xffffffff
    Serial number of failed request: 791
X Error of failed request: BadWindow (invalid Window parameter)
    Major opcode of failed request: 3
    ResourceID in failed request: 0xffffffff
    Serial number of failed request: 793
Error in startup script: Togl: couldn't get visual
    while executing
"togl .mesa  -width          400  -height         400  -ident          .mesa  -rgba           true   -redsize        1      -greensize      1      -blu..."
    (procedure "PlaceGlobWin" line 105)
    invoked from within
"PlaceGlobWin 0 [expr round(650 * $fac1)] [expr round(650 * $fac1)]"
    (procedure "ViewMol" line 25)
    invoked from within
"ViewMol ."
    invoked from within
"if { [llength $argv] > 2 } {
    parseComLinArg [lrange $argv 2 end]
} else {
    ViewMol .
}"
    (file "/software/xcrysden-1.5.60/share/xcrysden-1.5.60/Tcl/xcInit.tcl" line 609)
X Error of failed request: BadWindow (invalid Window parameter)
    Major opcode of failed request: 12
    ResourceID in failed request: 0xffffffff
    Serial number of failed request: 796

Both GLXinfo and GLXgears work as expected.

If I try the same from a Windows machine - with X forwarding , xcrysden works as expected.

Any ideas what’s going on?

Thanks

Tim