Sometimes messages like below can be seen even when the number and size of global variables in the OPSVIEW panel 4.8 are very low or have values that should be handled by the number of blocks reserved by the parameter GLOBALMAX:
OPS/MVS OPS4290O GLOBAL VARIABLE WORKSPACE IS 98.5% FULL (39400 OF 40000 BLOCKS USED). PROGRAM=xxxxxxx
Other related error message that can be shown is when the workspace is being used by RDF tables:
OPS7593J GLOBAL VARIABLE (RDF) WORKSPACE OVERFLOW