Something
public text v1 · immutableinvalid command name ""
while executing
"$source serialize"
(procedure "::struct::matrix::_=" line 2)
invoked from within
"::struct::matrix::_= ::m {}"
("uplevel" body line 1)
invoked from within
"uplevel 1 [linsert $args 0 ::struct::matrix::$sub $name]"
(procedure "::struct::matrix::MatrixProc" line 20)
invoked from within
"m = [::csv::read2matrix [open C:/MyMatrix.tsv] m \t]"