This file contais a list of known but not yet fixed bugs in ngspice.
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Rework15fixed:

* define/let commands: 
  the following code causes a segmentation fault:

   ngspice 1 -> define max(x,y) ( x gt y ) * x + ( x le y ) * y
   ngspice 2 -> let z = max(2,3)
   vec_free: Internal Error: not in plot
   Segmentation fault (core dumped)

  The problem seems caused by the attempt to free an already freed 
  memory area in free_pnode and free_vec functions.

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* output redirection:

   ngspice 1 -> print v(1) > data.txt

  This syntax does not work anymore (it worked in rework-14). If you 
  want to use output redirection you have to remove spaces around ">":

   ngspice 1 -> print v(1)>data.txt

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* return value:

  When ngspice is called in batch mode it returns 1 even if the simulations
  are run. The problem arise when there is a .control section but no
  .print, .plot or .fourier lines. Ngspice outputs:
  
    Note: No ".plot", ".print", or ".fourier" lines; no simulations run 
  
  and exits returning 1.
  
  Workaround: add -r <dummyfile> to the command line to avoid this.