Getting simulation error

haq.azzam — Wed, 13 Jul 2022 23:34:19 GMT

Hi I have a basic circuit that I copied from an online tutorial that was using LTSpice. I keep getting the below error when trying to run a simulation. I recognize the op amps should have a positive and negative source but that shouldn't affect the simulation from running in the first place?

Warning: singular matrix: check nodes n_8 and n_8

Note: Starting dynamic gmin stepping

Trying gmin = 1.0000E-003 Note: One successful gmin step

Trying gmin = 1.0000E-004 Note: One successful gmin step

Trying gmin = 1.0000E-005 Note: One successful gmin step

Trying gmin = 1.0000E-006 Note: One successful gmin step

Trying gmin = 1.0000E-007 Note: One successful gmin step

Trying gmin = 1.0000E-008 Note: One successful gmin step

Trying gmin = 1.0000E-009 Note: One successful gmin step

Trying gmin = 1.0000E-010 Note: One successful gmin step

Trying gmin = 1.0000E-011 Note: One successful gmin step

Trying gmin = 1.0000E-012 Note: One successful gmin step

Warning: singular matrix: check nodes n_10 and n_10

Warning: Dynamic gmin stepping failed

Circuit: * spicenetlist

Doing analysis at TEMP = 0.000000 and TNOM = 27.000000

doAnalyses: matrix is singular

dc simulation(s) aborted

Error(parse.c--checkvalid): v_v2#branch: no such vector.

Note: No ".plot", ".print", or ".fourier" lines; no simulations run

Betreff: Getting simulation error

holger.vogt — Mon, 18 Jul 2022 14:07:28 GMT

R2 is not properly connected.

topic Betreff: Getting simulation error in EAGLE Forum

Getting simulation error

Betreff: Getting simulation error