you should have used:
alter database HCP on HCP_data_001 = '10G'
.....instead of
alter database HCP on HCP_data_001.dat = 10G
ALTER DATABASE takes the ASE *device* name - not the disk pathname.
you should have used:
alter database HCP on HCP_data_001 = '10G'
.....instead of
alter database HCP on HCP_data_001.dat = 10G
ALTER DATABASE takes the ASE *device* name - not the disk pathname.