Your program needs to release storage when it used a hiperspace for one purpose and wants to reuse it for another purpose, or when your program is finished using the area. To release the virtual storage of a hiperspace, use the DSPSERV RELEASE macro. (Hiperspace™ release is similar to a PGSER RELEASE for an address space.) Specify the STOKEN to identify the hiperspace and the START and BLOCKS parameters to identify the beginning and the length of the area you need to release.
After the release, a released page does not occupy expanded (or auxiliary) storage until your program references it again. When you again reference a page you have released, the page contains hexadecimal zeroes.