OPSVIEW Control Option › How to Control Global Variables (Option 4.8) › Fields on the Display Global Variables Panel - Left View

Fields on the Display Global Variables Panel - Left View

You see the following fields when you first enter option 4.8 and when you press the LEFT PF key. The fields of data that appear on the left side of the Display Global Variables are:

System

Specifies the name of another MSF-defined system you want to display the global variables for.

Wait

The number of seconds to wait for a response from a remote system.

Access Date

To display a list of variables that have not been accessed since a particular date, specify the date (in the form YYYY/MM/DD) in this field. Only those variables whose last date of access is less than the date you specify will be displayed. This feature can help you determine which variables are obsolete.

Global Prefix

The high-level node name of the selected subnode.

Subnode Name

The last segment in the name of the variable.

Nodes

The number of subnodes for the node.

Subnode Value

The data for the variable.

If the length of the variable is more than 56 bytes, you must issue a command to see the additional data. The Display Global Variables panel does not indicate the length of a variable; therefore, if you suspect there is more data for a variable, issue the B, M, or X line commands. For details, see Line Commands for the Display Global Variables Panel in this chapter.

Important! If the variable has been dropped, the value of this field is reset to the variable name itself. However, if this particular variable does not exist, the text string NO VALUE ASSIGNED AT THIS LEVEL appears in this field.

For example, suppose that a line of code assigns a value of 6 to GLOBAL.A.B. Unless another line of code explicitly assigns a value to GLOBAL.A, the string NO VALUE ASSIGNED AT THIS LEVEL appears as the value of GLOBAL.A.

Taking this example one step further, if you used the OPSVALUE() function with the E option to see if GLOBAL.A exists, OPSVALUE would return a value of N, meaning that the variable does not exist (no storage exists for it).

Now suppose that GLOBAL.A is assigned a value. Even though GLOBAL.A.B is a subnode of GLOBAL.A, they are two totally different variables. It is not necessary for GLOBAL.A to exist for GLOBAL.A.B to exist.