Empty error on invalid colmap column nam

% view {a b} def {} | colmap fda | dump

 % set errorInfo

    while executing
 "vlerq colmap {def {a b} {}} fda"
    invoked from within
 "vlerq size {colmap {def {a b} {}} fda}"
    invoked from within
 "view $vid size"
    (procedure "::vlerq::dump" line 2)
    invoked from within
 "::vlerq::dump {colmap {def {a b} {}} fda}"
    invoked from within
 "view {a b} def {} | colmap fda | dump"
    ("uplevel" body line 1)
    invoked from within
 "uplevel #0 {view {a b} def {} | colmap fda | dump}"

If its possible, something like 'invalid column name' would be useful here.

Summary

Good catch. Now fixed in svn. Thanks.