Frequently Asked Questions


1) Which package have I to download for a Unix system if I'm not interested in the graphical interface?

Answer: equ_gui.tar.gz is the file to download; install it as described in the README file and run equiv with the command "equiv"; this will use a c-shell script instead of the Tcl/Tk one.


2) How can I install  Tcl/Tk interpreter on my system?

Answer: the Tcl/Tk toolkit is distributed under the GNU licence. You can download the interpreter from several sites. One, which is very convenient, is;  it provides executable installation files for Windows, Linux, HP-Ux and Solaris based systems.


3) I'm using a Windows system and I tried to install the package in a directory different from the default one: the graphical interface does no longer work. Why?

Answer: when installing the package in a directory different from the default one, you should edit the equ_gui.tcl file and change, accordingly, the DIR variable (set DIR drive:/your_directory/equlib).


4) I try to run the graphic interface but got an error when clicking on the Process button: 
Error. bad switch "-elide": must be -forward...
What can I do to fix the problem?

Answer: You need the 8.4 version of the Tcl/Tk interpreter, or a successive version of it.


1) The main window appears too large...

Answer: probably you set a low resolution (800x600 or lower) of your graphics card. If you cannot increase the resolution, you could diminish the dimension of the Equiv window, by using the config/dimension menu.


2) The main equiv window or the output and help windows appear not centered on the desktop; in particular the output window appears quite shifted on the right and it is visible only a portion of it. Is it possible to fix its position once for all?

Answer: drag the window in the position you prefer, then select config/Fix position. This procedure works for any window generated by the program. In the case of the main window, its absolute position is recorded; as concerns the other windows, the displacements with respect to the main one are saved.


3) I noted that, differently from positions, fonts and colours, the autoload and autosave preferences are not remembered in different sessions of the program...

Answer: if you want to save these settings, select Config/Save configuration.


4) I cannot print the output (Window version): the print button of ActiveView is disabled.

Answer: in the Windows version it is not possible to print by using the interface. However, the output file can be opened with any other editor (e.g. WordPad) and printed with it.


5) Fonts are too small and I cannot change them through the Config/Fonts menu (disabled under the Windows version).

Answer: edit the file equguirc and set the variable font_dos  with some larger font name (e.g. "courier 10"). If you have .equguirc configuration file in the main directory of the distribution (default c:\equiv), edit it and set, in the same way, the variable fnt.


6) The output window (ActiveView) is too large; can I reduce its dimension?

Answer: it is not advisable to reduce the width of the ActiveView window under 80c (where c stands for columns); the default width is 100c. To reduce this value you must edit the file equguirc, which is located in the equlib directory, and set the variable output_width to the desired value.


7) Is it possible to visualize the General Help in a text window instead of an Internet browser?

Answer: in the Linux/Unix version, the default is to visualize the help in a text window (the file equiv.hlp is loaded in a Tk text field. In the Windows version the default is the use of an Internet browser whose name is specified in the variable  exp_com in the equguirc file. To change such default in the Windows release, modify the value of the variable help_type to something else than MSIE