用saber2007 DC仿真手中一款节能灯电路（实物），新手，在论坛和网上找了各种资料，无法解决。请各位大师帮看看，万分感激。
错误提示：
*** ERROR "MAST_NO_NUM_EQUATION" *** Numerically no equation at /n_263.*** ERROR "ALG_SINGULAR_JACOBIAN" *** Singular Jacobian matrix.Some possible causes for a singular Jacobian matrix:- Model operating outside of its intended region of operation.- Node/subsystem with no connection to the reference (floating).- Current loops (voltage sources/inductors in parallel).- Missing equation and/or missing variable reference.
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