Data Set in Use

Only one user or job can have a data set or member open in edit mode at one time, but more than one user can open a data set or member in view mode.

If a user opens a data set or member in edit mode, no other user can edit or view that data set. However, if a user opens a data set or member in view mode, another user can open that data set in either edit or view mode.

If a user attempts to open in edit mode a data set or member that is already open in either view or edit mode, the Data Set in Use dialog displays. This dialog displays the following information about the job currently accessing the data set:

• Job Name
  Name of the job that has the data set open in view or edit mode

• Major Enqueue Name
  The data set resource name used by dynamic file allocation

• Enqueue Type
  The enqueue type is one of the following:

  • SHR
    File can be allocated by other users.

  • EXCL
    File is allocated exclusively to the job.

• System
  Name of the LPAR on which the resource is allocated

To exit the Data Set in Use dialog, do one of the following:

• Click Cancel.
  The action is canceled and the dialog closes.

• Click Continue
  If the data set is already opened in view mode, your request is processed and the data set opens in the editor.
  If another user already has the data set open in edit mode, a message displays informing you that you cannot edit the data set. Click OK and your action is canceled.