Thanks for your answer, Greg,
when I use your advice I have the same effect. So my code is OK.

Again: the problem is, that the table shows right only then when I set this breakpoint during debugging; I think because of the pause (the table has 300 rows). When I delete this breakpoint the table changes NOT to the new column widths.
It seems to me that because of the breakpoint the table 'has time' to 'refresh' and shows new columns width. Otherwise, without breakpoint, not.

Something new:
Today I have set a STOP (VBA order, not a breakpoint) after my setProz routine and the table changes the column widths... astonishing.
But now I have a new problem: How to continue the code after the STOP ???

Regards
Dietrich