![]() ![]() This can sometimes result in a “Duplicate component name” error message when simulating if the names of the elements are not all unique. However, when you are recreating a schematic from another source like a book or problem set, it is natural to rename the components to match the reference. When dropping new components into your schematic, CircuitLab ensures that the new elements all have a unique name. Tracking down the source of the issue can be tricky, so be patient and methodical. See for example the Behavioral Sources section in CircuitLab Academy. Note that parameters in CircuitLab can be used to build arbitrarily complex expressions. In the error shown below it is telling us the parameter R1.R has an issue. In some situations CircuitLab is able to tell you roughly where the error is. Make sure they are all numbers, or expressions that can evaluate correctly. To fix this issue, go back to Build mode and double check all your parameter values in your circuit. There are some situations in which this is a valid use case, however here the parameter x is not defined anywhere else which causes CircuitLab to throw an error. In this case the user typed "x" into the resistance value. Here is another example of a similar error. CircuitLab's expression parser is unable to figure out what this means and triggers an error when switching to Simulate mode. In this example, a simple typo attempting to type 3.3K into the resistance parameter, resulted in 3,3K with a comma instead of a period. A common error case is a parameter that cannot be parsed by the engine. Parameter values in CircuitLab are extremely versatile, but the versatility can be a double-edged sword. The ground (GND) element is found at the top of the toolbox under Essentials. To fix this simply go back to Build mode and add a ground node to your circuit. ![]() When your circuit is missing a ground, you will usually get an "Unable to get solution" error. Every circuit needs a ground node to be able to simulate because this defines the circuit’s zero-voltage reference point. Missing GroundĪ missing ground node is one of the most common sources of errors. This guide covers some of the most common issues we see and explains how to solve them.īefore diving into this guide make sure you read our Simulation Basics document as well as the Ultimate Electronics Book section on Schematics and Simulation. ![]() Working through these errors requires patience and experience. As with any general purpose user-programmable software, it is possible to get into a broken state where the simulator is unable to find a solution to your circuit, or sometimes to even parse your schematic. CircuitLab is a very flexible tool with a wide range of applications. ![]()
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