When using stream files, the following data set access restrictions apply:

• As a DFM user, you cannot use record file access methods to access stream files. However, as a local z/OS® user, you can use standard DFSMSdfp record access methods to access stream files.
• Alias names for PDSE and PDS members are not supported by DFM. Only the true names can be used to access a file.
• If a local z/OS user updates a PDSE member that was created as a stream file with associated DDM attributes, the attribute extension cell containing those attributes is lost. As a result, the PDSE member loses its stream file properties and assumes a file class of sequential file. At the present time, there is no way to correct this situation.