this is a small thing, you should not place macros inside quotes:
this line:
 Code:
If Not Exist("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\@USERID")

should be:
 Code:
If Not Exist("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\"+@USERID)

and inside the Else
change these lines:
 Code:
If (Exist("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\@userid\meprs") = 0)
   MD ("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\@userid\meprs")
EndIf

to these lines:
 Code:
If Not Exist("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\"+@USERID+"\meprs")
   MD ("\\nvzramcw3vn101\6-MDG-G\Data\6 MDG Network Drives\Users\"+@USERID+"\meprs")
EndIf
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