On 12/09/2009 5:04 PM, sebed1110-div...@yahoo.fr wrote:
Hi,
the error message is "Error: protect(): protection stack overflow"
63000 objects is far more than most people would use, so you may have
hit an internal limit. The "protection stack" is used internally by R
to temporarily mark objects as "in use" even if they haven't been
assigned anywhere; overflows usually signal a bug in some code. By
default, it is limited to 50000 entries, and it's very rare that any
code would generate more than that number of temporary objects.
However, if you have 63000 objects, it's conceivable that they are all
protected at some point during loading.
The easiest way to fix this may be not to produce so many objects. I
suspect that they aren't all meaningful to you, you probably produced
them automatically. So why not store them within a list, or some other
structure? That's the normal way to program in R.
If you can't do that, you may be able to read your file by recompiling R
with a larger stack limit. The line to change is in src/include/Defn.h
around line 214, currently
#define R_PPSSIZE 50000L
Change that to a larger number and you might get lucky.
Duncan Murdoch
Edwige.
________________________________
Dear all,
I can't load my workspace of 25Mo on R version 2.9.2, because of "
But I saved it normally (save.image()), and I didn't get any notification...
Does anyone know what that can be due to? Is there any limitation of number of
objects (+/-63000)?
At least, the error message would be helpful.
Uwe Ligges
Thanks
Edwige Polus.
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and provide commented, minimal, self-contained, reproducible code.
