[GRASS-user] v.net.iso problem?

[Annalisa Minelli]

Dear all,
I'm testing v.net.iso on some river networks to calculate the "distance
zones" along the river from a date point (cross section), and *sometimes* I
found this strange error (in more versions of GRASS: I updated software
yesterday, compiled and tested on 64, 65 and 70.. with the same results):

Number of centres: 1 (nlayer 2)
Calculating costs from centre 1...
 100%
Generating isolines...
*** glibc detected *** v.net.iso: realloc(): invalid next size: 0x085ecfd8
***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6b591)[0x3ea591]
/lib/tls/i686/cmov/libc.so.6(+0x70cbd)[0x3efcbd]
/lib/tls/i686/cmov/libc.so.6(realloc+0xdd)[0x3eff9d]
/usr/local/grass-6.5.svn/lib/libgrass_gis.so(G__realloc+0x35)[0x11eb55]
v.net.iso(main+0x15b9)[0x804a889]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0x395bd6]
v.net.iso[0x8049231]
======= Memory map: ========
00110000-0015d000 r-xp 00000000 08:01 137602
/usr/local/grass-6.5.svn/lib/libgrass_gis.6.5.svn.so
0015d000-0015e000 r--p 0004c000 08:01 137602
/usr/local/grass-6.5.svn/lib/libgrass_gis.6.5.svn.so

and so on for some tens of lines.
The very strange thing is that in some cases the module produces the right
output and gives no errors, in other zones I obtain this error evenif the
input data are prapared in the same way.

What am I wronging? Any ideas?

Many thanks, Annalisa
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