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What does "too few nodes" mean in this circuit? Any connection error? If it is some library error, please help with the solution.

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    \$\begingroup\$ I'd suspect U1 and/or your use of U1. Is U1 using an encrypted model? Is it appropriate and tested for LTspice? Etc... \$\endgroup\$ Oct 17, 2023 at 21:24
  • \$\begingroup\$ @periblepsis How to know that? \$\endgroup\$
    – Andr7
    Oct 18, 2023 at 3:45
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    \$\begingroup\$ I've only seen that error when someone was using an encrypted model or when they were mis-applying a model they didn't well-understand. Also, I'm pretty sure that if you delete U1 and clean up a few details (perhaps) the error will go away. If it doesn't go away after removing U1, then post up the netlist and I'll try it myself. But I think U1 and/or your use of it is the issue here. \$\endgroup\$ Oct 18, 2023 at 4:42
  • \$\begingroup\$ @periblepsis is correct. You’re using the PSpice encrypted model. Texas Instruments also provides the unencrypted version so you need to download that instead and try again. \$\endgroup\$
    – Ste Kulov
    Oct 18, 2023 at 7:36
  • \$\begingroup\$ I got the other model which is not encrypted. Thankyou so much! \$\endgroup\$
    – Andr7
    Oct 18, 2023 at 8:17

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