Step 7 UDT question

Anyone how knows how many levels deep UDT'a may used.
DB1 contains UDT1
UDT contains UDT2
and so on.

Same question for Structures.

And to make it all worse. UDT in Structure and v.v.. Anyone out there how has ever struggled with it.

Just tried it, got to UDT6 before the nesting depth was reached when trying UDT7, e.g. if s are structures, x is structure element.

s1.s2.s3.s4.s5.s6.x1

Edit:Tried the S7 help, it states six nesting levels for UDTs, 8 for STRUCT (I tried it and it is 6 for struct as well though)

I have tried a lot of possibilities but it seems both structures and UDT may be six levels deep.