Tcl::pTk::Error: Can't call method "_retListContext" without a package or object reference at /Users/xxx/perl5/perlbrew/perls/perl-5.24.4/lib/site_perl/5.24.4/Tcl/pTk/Widget.pm line 2842.

    while executing
"if {$catchVal != 0} {
                        if { $retVal != "_TK_BREAK_\n" } { # BREAK returns are not errors
                                return..."
    (command bound to event)