Unable to increase the size of the filesystem

chfs -a size=+10G /dev/coc01dblv
0516-404 allocp: This system cannot fulfill the allocation request.
        There are not enough free partitions or not enough physical volumes
        to keep strictness and satisfy allocation requests.  The command
        should be retried with different allocation characteristics.



 root@dcccccccc::/> chfs -a size=+10G /dev/coc01dblv
0516-404 allocp: This system cannot fulfill the allocation request.
        There are not enough free partitions or not enough physical volumes
        to keep strictness and satisfy allocation requests.  The command
        should be retried with different allocation characteristics.

Since your upper bound is 1 you cannot go more than 1 disk
 chlv -u 4 lvnam

        -u upperbound
            Sets the maximum number of physical volumes for new allocation. The value of the upperbound variable
            should be between one and the total number of physical volumes. When using super strictness, the upper
            bound indicates the maximum number of physical volumes allowed for each mirror copy. When using striped
            logical volumes, the upper bound must be multiple of stripewidth. If upperbound is not specified it is
            assumed to be stripewidth for striped logical volumes.

now able to increase the size of the FS