Replace Member - error solution exception

[ctu6]

Any ideas why this happen?

ReplaceMember_error.gh (61.5 KB)

[HS_Kim]

It seems your first list has some null items…

[ctu6]

Hi @HS_Kim,

Thanks a lot for helping me find the null item, didn’t expect that happened.

I wonder if there’s a way to retrieve the null index (not replace null)?

[HS_Kim]

@ctu6

I wonder if there’s a way to retrieve the null index (not replace null)?

ReplaceMember_error_re.gh (60.0 KB)