问题 i have a code that generates a permutation based on the inputs of 8 columns and concatenates the columns together. it works great so far but i came up with a problem. it works when more than 2 rows are filled. so if theres only one entry in row 10 for any of the columns from A-H it crashes. the rows are filled with A,B,C across all 8 columns, if column 8 only had A then it crashes I've also tried Set col1 = Range(Range("A10"), Range("A" & Rows.Count).End(xlUp)) instead of Set col1 = Range(