create custom attribute in SOP, import it in VEX,but I want modfy the attribute in VEX loop and send it to next SOP flow.
Example:
1 SOP: attribCreate : aa (float) default 1.0
2 VEX: import attribute aa,
3: modfy aa in VEX loop. like aa*10=10.0
4: create point node below the VEX node., in this time I can get $Aa=10.0

anybody help me ?

use:
addvariablename(“aa”, “AA”);

this Adds the mapping of the attribute aname to the local variable vname,