[GRASS-user] mysterious error (WARNING: Cannot open old vector on level 2)

[Hamish]

Henry House wrote:
> I'm having mysterious errors trying to use various modules in my
> database (GRASS 6.1 running on Debian), which contains mapsets
> PERMANENT and hajhouse.
> 
> example:
>    GRASS 6.1.cvs (sacramento_sanjoaquin):~/grass > ps.map
>    in=Scripts/psmap_script output=out.ps 
>    
>    WARNING: Cannot open old vector soil at hajhouse on level 2
>    ERROR: soil in hajhouse : can't open vector file
> 
> g.list vect reports:
>    vector files available in mapset hajhouse:
>    soil 
>    
>    vector files available in mapset PERMANENT:
>    cont_10      cty_bounds   hydro        plsa         rd_local
>    rd_state     
>    rd_usa       soilmu_a_sac soilmu_l_sac soilmu_p_sac soilsa_a_sac
>    soilsf_l_sac 
>    soilsf_p_sac urban        
> 
> Trying to use v.out.ogr fails with the same error. Trying to display a
> layer in QGIS (via grass plugin) fails with a rather unhelpful error
> that the layer is not a valid layer. The error presented is the same
> for soilmu_a_sac at PERMANENT and soil at hajhouse but some other layers in
> this database work fine with all GRASS modules. All the layers
> including the problematic ones display fine in the GRASS GIS manager,
> however.
> 
> What is puzzling and frustrating about this is that it worked fine a
> month or so ago.  Then I set work in GRASS aside for a month and now
> that I have resumed the errors are here.  I have not altered my GRASS
> binaries or support files in the meanwhile, and AFAIK my OS library
> versions have not been updated either.


rebuilt topology with:

v.build soils
  or 
v.build.all   # to rebuild all vector maps in current mapset

then it should work again.

(unless files are totally corrupt on the disk)


Hamish