simulation error message

[645645645]

Hi,

I really need you help. I've bought a book with a Multisim 10.1 Student Edition.

When I want to simulate something, I receive the following error message:

"This circuit has no power sources: unable to determine the simulation timestep automatically.
Please add a power source or set the simulation timestep under "Interactive Simulation Settings" to proceed."

I am using Windows XP.

Some time before I downloaded Evaluation Version from NI website and had the same problem.

Thank you for your help.

Best,

Anis

[Johann.Wagner]

Hi,

seems that you have forgotten Power Source like VCC, VSS or AC/DC Source or forgotten the Ground (Analog/Digital Ground)

Attached here an example in *.doc. Please attache here your *.ms10 circuit if problem still exists

Best Regards

[Rialter]

Hi,

Just as Johann explains, you need to set a VCC and GND on your schematic so the digital components can work correctly, here's a link to a document that has a more detailed explanation on why you need them and how to connect them.

http://digital.ni.com/public.nsf/allkb/221393F998C08491862571ED0077FCC3?OpenDocument

Hope the information is useful.

Good Luck