CVPMULTIPLIER=multiplier
on the LIBNAME statement.
LIBNAME MyCAS cas caslib=ABCXYZ cvpmultiplier=2.5; /* or 2 in your case */
But I would first make sure you have everything correctly represented on a V9 library in SAS VIYA 3.5 (that's a directory path and *.sas7bdat file on your Linux / UNIX file system).
If you do not specify any engine on the LIBNAME statement , SAS defaults to the V9 engine.
Then upload in-memory (to CAS). CAS has much more data types than *.sas7bdat and internal conversions may be done in order to save space for example. These conversions should happen automatically.
Koen