In my opinion: the PLC-offset contains normally only stresses without (!) the correspondendig loads:
The stresses of the primary load case are used with GRP FACL=1. If the loads of the primary load case are applied simultaneously, then (!) the system is in equilibrium and no additional displacements arise (if no changes are made in the system).
Using ECHO LOAD EXTR one can obtain an output of the internally generated loading at every node. This option should be used generally during analyses with primary states, because it is the best means for tracking down errors in the description of the states. The really applied nodal loads (nodal load vectors) can be represented with the program WinGRAF. Further instructions can be found in the description of the record GRP in the TALPA manual or in the examples.
The old loads must be applicated with “LCC xx PLC YES”, new addionally loads with “PLC NEW”. As an ASE-/CSM-instance: “csm4_quad_singlespan.dat”.
Because STOR YES is only important for the nodal coordinates and no other things, this should be there the same. Further from the (ASE2020-manual chapter 3.4)
Caution: All results of the nodal displacements are extinguished during the geometry update. Therefore the data base must be saved absolutely before! With the input STOR=NEW to STOR=NEGZ all other results are extinguished too, because the local directions are twisted. With the input STOR=YES it is possible to use the old stresses via the record GRP, if no beam elements are available. It may be necessary to update existing loads using SOFILOAD LC TYPE REST, especially free loads POIN.LINE,AREA.