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This compilation of frequently asked questions is still under construction. It will get updated on an irregular basis, depending on the time I have available and the ideas that emerge from my support activities. This document has last been changed on May 26, 1996 .


1. Running EMME/2

1.1. Is there a shortcut to start up EMME/2?

Indeed it is possible to bypass the normal startup dialog of EMME/2 and enter a specific EMME/2 module directly. This is done by calling emme2 with the corresponding 3-digit module number as argument (no decimal point!). Most often this is done with the command ``emme2 000'' which brings up the EMME/2 main menu without asking any initial questions.

Note that using this shortcut to enter EMME/2 should only be used when continuing to work with EMME/2 after having temporarily left the system for performing some other tasks. At the very beginning of an EMME/2 working session the system should always be entered normally with the standard startup dialog. This not only ensures that you work with the proper settings (devices, user initials, scenario), but also performs some consistency checks on the data bank which otherwise are not executed.

As a principle, never use the shortcut when working with a new release of EMME/2 for the first time on an existing data bank.

2. EMME/2 Menu Commands

2.1. What are EMME/2 Menu Commands?

EMME/2 menu command are the commands that can be entered at the level of the EMME/2 main menu, i.e. as valid answers to the question Enter: Next module=. Normally, at this point the user enters a module number, but there are many other useful commands that are allowed at this level. Use the menu command help to display a summary of all available menu commands.

2.2. How can I find out the dimensions of the current data bank?

Use the dim menu command. This command displays the current data bank dimensions. Note that these values do not reflect the actual number of elements currently defined, but reflect the space that is allocated for these elements. These dimensions are specified when the data bank is initially created, and some of them can be modified later on using the macro MODIFYDB.

2.3. How can I change the current scenario?

The current scenario can be changed using the scenario= (or short s=) menu command. If given with a valid scenario number, this scenario will become the new current scenario. If no scenario number is given, a list of all existing scenarios is displayed. In addition, if switch 6 is on (menu command on=6) the user is prompted for the current scenario whenever she starts a new EMME/2 session.

2.4. How can I find out the assignment status of the current scenario?

The menu command status (or short sta) can be used to display a summary of the current scenario. This summary includes the current network size and the current assignment status, including all parameters used to prepare the assignments.

2.5. How can I set the report page number to a given value?

Use the page= (or short p=) menu command. This command can be used to set the current page number to an arbitrary value. For each subsequent report page generated, this number will be increased by 1. Thus after the command p=0 the next report will start with the page number 1. If no value is specified, this command simply displays the current page number.

3. Switches

3.1. What are switches?

In EMME/2 a set of switches is available to control various aspects of the system behavior. The switches are numbered from 0 to 31 (the are internally stored as a bit pattern) and they can be accessed with the menu commands on=X (set switch X), off=X (reset switch X) and switch=X (show status of switch X). The command switch= (or short sw=) without switch number displays the status of all switches.

3.2. How do I read in a new device table?

In order to read in a new device table, switch 10 has to be set with the menu command on=10 and then the EMME/2 session should be terminated. The next time EMME/2 is started it up again with the command emme2 (no shortcut to enter directly a specific module!), the new device table is read and the user is prompted to select the new terminal, printer and plot file device.

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Copyright 1996. Heinz Spiess, EMME/2 Support Center, CH-2558 Aegerten, Switzerland
Last changed on Sun May 26 18:42:58 MET DST 1996