Saving an adaption register for subsequent use
When a register is created for adaption or other post-processing purposes, it is lost once you use it or after you save the case.
There is basically no direct way to preserve the register or the information of the register for subsequent use.
One way to preserve the infomation would be to create a User Defined Scalar (UDS) array and patch the value of 1 in all the cells of the register and the default 0 in the rest of the domain. So the procedure would be:
1- Generate your register by any mean (gradient, iso-value, region...)
2- Define a UDS
3- Patch the UDS with 1 in all the cells of the register (use the number 2, 3 and 4 if you have a second, a third or a fourth register, respectively)
4- When the case is saved, the UDS will remain in the database.
5- Open the case again and regenerate the register by using iso-value adaption with UDS values between 0.9 and 1.1.