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Re: FreeExpr called on live expr.

  • To: mathgroup at
  • Subject: [mg5029] Re: FreeExpr called on live expr.
  • From: schoon at (Johannes Schoon)
  • Date: Sat, 19 Oct 1996 16:40:32 -0400
  • Organization: Chalmers University of Technology
  • Sender: owner-wri-mathgroup at

hans.steffani at wrote:
: I get the error in the Subject:-Line when calling
: LinearSolve[ M, r]
: where M is an 8x8 matrix with 23 zeroelements and the rest around
: the diagonal. The notzeroelements are more or less simple
: expressions (only + - * /). What can help?

: Hans Friedrich Steffani

If you run mathematica kernel 2.2.4 on a digital DECalpha, it's a
known bug. Mathematica suddenly says (something like)

  Internal error:: FreeExpression called on live expression.

and there is nothing you can do about it but retreat to release 2.2.3.
They described this "very unusual" bug on their web-site before, but
now that page has been removed. One guess is that they wish their
costomers to have fun with mathematica for a long time before they
give up. Another guess is that they think this bug shouldn't bother
anyone anymore since v. 3.0 is on its way.

Don't ask me how long it will take them to port 3.0 to DECalphas, the
notebook interface arrived (in working condition) only a few months


Johannes Schoeoen

"master of research under the event horizon"
(No matter how much work you throw in, nothing ever comes out.)
dept. of Naval Architecture and Ocean Engineering
Chalmers University of Technology, Gothenburg, Sweden

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