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TROUBLE-SHOOTING - INSTALLATION
System does not load, or install will not run
SUMO can only run on an IBM compatible PC with a 286 or above, with 550k minimum memory. 2MB of hard disk space is also required.
Install complains of corrupted files
Exit Install, and type at the DOS prompt:
SET SLOWINSTALL=1
and try again. If this fails, please phone, fax or send back a bug-report form and your problem will be given top-priority. You may like to try to install it on another PC if you are not sure if there is a problem with the PC or the diskette.
Program will not run, says "Please Re-install"
SUMO has detected an error in one of its files and must be re-installed. If it says this when you have not changed any part of the machine (including the version of MS-DOS) then run a virus check program first. SUMO will not run if infected. In some circumstances this message will appear when network software or Windows is running. Please let us know if this is the case.
Problems occur with 32bit SUMO and EMM386
If you are using DOS 6.xx then MemMaker likes to add the following statement to the EMM386 line in the CONFIG.SYS file:
DEVICE=C:\DOS|EMM386 ......I=xxxx xxxx.....
We have found that if the "I" setting is used then problems can occur. By removing this you should not see any noticeable difference to your system and it would cause the SUMO software to work correctly.
UNDO will not work and other operations are not functioning
Make sure you have the variable "TEMP" set. In your
AUTOEXEC.BAT file you should have the line:
SET TEMP=C:\TEMP (or SET TEMP=C:\TMP)
FFT and printing does not work
Make sure that DOS & WINDOWS know where to find the COMMAND.COM file, the command interpreter program. If you type SET at the DOS prompt you should see something like:
C:\>set
CONFIG=WINDOWS
COMSPEC=C:\COMMAND.COM
FULTEMP=c:\sumo\dataoncd\temp
PROMPT=$p$g
PATH=C:\WINDOWS;C:\DOS;C:\SUMO;C:\UTILS
TEMP=C:\TEMP
SOUND=C:\SB16
BLASTER=A220 I5 D1 H5 P330 T6
MIDI=SYNTH:1 MAP:E
There should be the line COMSPEC=.... which will point to the directory and filename of your command interpreter. This line is sometimes added by other DOS or WINDOWS installation programs. If this is not the case then you must add the following line to your CONFIG.SYS file:
SHELL=C:\DOS\COMMAND.COM (or whatever directory the COMMAND.COM file is in).
Installation goes half-way but does not complete
Failure to install can be caused if there is not at least 550K of free base memory, i.e. the memory in the lower 640K segment of RAM. Although the SUMO V3.0 software uses extended memory, the installation program does not. If there is less than 550K of base memory then try loading other drivers into HIGH memory or remove some drivers which are not necessary.
Printing/display does not work or is incorrect
Make sure you have run the SETUP program within the SUMO files. If not, go to your directory containing the files and type SETUP at the prompt. Make sure you have not asked for the 800x600 video mode if your machine only supports video up to 640x480 VGA mode. Alternatively, try a lower resolution video mode in the SETUP program.. Make sure that the correct printer is selected at the correct port, and the EJECT is selected as required.
Fonts cannot be found, program will not start
If you have installed the software and perhaps moved it into a different directory or not installed it in C:\SUMO then the programs may be looking for files in the wrong place. To check this, you can view the file called CONFIG.DAT:
C:\SUMO>type config.dat
$ WRAITH GUI graphics support setup
$ Video mode
VIDEO "800_600_16"
$ Selected system font:
FONTS "C:/SUMO/SSERIFF";
$ Printer port selected (see also PRINTDRV.BAT)
PRINTER "LPT1"
$ Enable sound
SOUND;
If any of the files are pointed to in an incorrect directory then edit the CONFIG.DAT file to include the correct path.
TROUBLE-SHOOTING - OPERATION
Cannot move or resize any windows
Windows are moved and re-sized by using the left or right hand mouse button. Not all windows can be moved or re-sized. Use the inside corner of windows to re-size, the centres to move.
Text entry does not work or hot-key support doesn't work
Keyboard data is directed to the window with the highlighted border. Select the window by positioning the mouse pointer over the top of it.
I cannot use SPICE compatible models within SUMO .
Look at details in the option: Extraction Tools .
Printing is very slow, and disk activity high
SUMO requires a disk cache to work best. It has been tested with smartdrv.exe, supplied with Windows 3.1. Read caching is the most important, but write-behind caching will greatly assist printing, with a 1-4MB disk cache. Caution must be exercised when using write-behind caching, it must be flushed back to disk (smartdrv /c) before switching-off, and run chkdsk occasionally.
When simulating, the message 'Reading Error' appears
If the netlist contains any file format errors, the circuit will not be simulated. These errors however will not generally get through the schematic's own checks. A .LST file is created by the SUMOS simulator which should automatically display this file if necessary.
'Out of memory' appears when simulating
16bit: If the simulator runs out of memory, refer to your MS-DOS handbook about maximising free DOS memory. Alternatively, there may be too many components for the simulator to handle.
32bit: Firstly the Rational-Systems DOS extender will use extended memory, which will obviously suffer with disk-caches, RAM-disks, Windows and EMM386 if it maps it into EXPANDED memory. When this runs out DOS memory will be used.
When trying to shell out to DOS nothing happens
For 16bit programs more DOS memory is required, or the circuit size is approaching the limits for the 16bit system.
When simulating with an external DOS simulator nothing happens
Either the simulator does not exist, or there is not enough DOS (or other) memory available.
When simulating, 'DC Convergence Failed' appears
Note that not all circuits can be numerically solved by simulators, and a DC bias and/or a transient run may fail simply because the simulator does not model the real world accurately enough. The DC bias will fail after ITL1 iterations have gone by and convergence has not been detected. ITL1 is a simulator option, set from the SIMULATION menu. Click-on OPTIONS to get at them.
Note that during a DC sweep the ITL2 variable is used.
When simulating, 'Transient Convergence Failed' appears
When a transient simulation step fails, the simulator will automatically back-off the time-step until it becomes a fraction of the user specified timestep. This ratio is RMIN. When it reaches this, the whole simulation fails.
The iteration limit used before backing off is ITL4.
What to try:
- Adjust RELTOL, VNTOL and ABSTOL.
- Try switching on the GOFASTER flag
- Increase rise and fall times of (offending) pulses
- Decrease GMAX and increase GMIN
- Check breakdown voltages in zenering diodes
- Simplify the circuit until it starts working - using the version-control system in SUMO you can quickly return to previous versions.
When simulating, the output is random noise, not smooth curves
Increase RELTOL
When trying to simulate, 'Bad Command Or Filename' appears
If the PATH is incorrect, or the simulator is not installed in your computer, the message: 'Bad Command Or Filename' will appear when SUMO tries to run it. Either install the selected simulator, or select a simulator that is installed.
When trying to simulate, 'Circuit 'foo' is still open' appears
SUMO can have many circuits open, at the same time. When simulating - because of memory restrictions in DOS - only the top circuit is preserved. Thus all others must be in an unmodified state.
Goto the others from the WINDOW menu and close them..
No circuit grid is visible in the circuit window
The circuits grid dots are controlled from the OPTIONS menu. Press DOTS and this will cause them to appear/disappear.
No component values and/or names are visible on the circuit
These attributes are controlled from the OPTIONS menu. Press VALUES and/or NAMES and this will cause them to appear/disappear.
Unwanted graphs keep appearing when simulating
In the FILE-OPTIONS menu there is a field which required de-selecting for the automatic creation of output for every probe and meter. This is here to prevent a scenario which results in no graphs at all, while SUMO is used for the first time.
More details of the DC run are required
All details of the DC run that the simulator has to offer are visible in the output file, viewed from SUMO by using the FILE-BROWSE menu.
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