Welcome to EasyEDA.
Please read:
[https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)<br>
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and the documents that it links to, in particular the Simulation Tutorial.
Then post back with sufficient information upon which to base a more helpful reply.
You are using a symbol:
1. from the Schematic Symbol library instead of the Spice Symbol library and;
2. for a device for which there is no spice model associated.
Note that a **ti**494 is an obsolete NPN bipolar transistor. There is a **TL**494 and an NCV494 PWM control chip neither of which have spice models available in the EasyEDA library.
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