Problem with cl_gui_column_tree length of item text

Hello,

I am using a column tree and with method add_nodes_and_items I pass my own structure in item_table_structure_name.

so far no Problem.

But:

if i define structurefield text with length 72 or less it works.

if i define it with more characters like 100 the columntree Shows no textfields at all - they are all empty.

i couldn_t find anything about a Limit of 72 Chars.

Thank you for your help.

Helmut