Map algebra functions did not work in V 10.2

IhabIhab

Map algebra functions did not work in V 10.2
This map algebra function was working successfully in v 9.3 but does not in v 10.2, the function is used to convert raster to polygon
Gridshape({raster}, weed)
Also
con($$rowmap mod 20  eq 0 and  $$colmap mod 20  eq 0, [FlowDir_Fill2])
the function is used to generate raster points from a raster layer

curtvprice

Map algebra functions did not work in V 10.2
This map algebra function was working successfully in v 9.3 but does not in v 10.2, the function is used to convert raster to polygon
Gridshape({raster}, weed)
Also
con($$rowmap mod 20  eq 0 and  $$colmap mod 20  eq 0, [FlowDir_Fill2])
the function is used to generate raster points from a raster layer

Map Algebra was totally re-engineered at 10.0. Welcome to 10.x!

The old Raster Calculator, Single-Output Map Algebra, and Multi-Output Map Algebra tools are gone and have been replaced with a Python-based approach. This is a disruption for many but a huge step forward in that at least four user interfaces to map algebra functions have been replaced with one consistent system built on arcpy.

I suggest reading this help article to get up to date:
Comparing Map Algebra between ArcGIS 9.x and 10