Error: Key <specific_storage> has not been found at ConfigTree.cpp, line 235

Hi all,

I am reading through the documentation of the 2015_Book_Thermo-Hydro-Mechanical-Chemic and unable to work through the sample model in chapter 2.7.4 with the files under the menu Tests\Data\HydroMechanics\Verification\hm1_3Dgravity. I am using OGS version 6.2.1 and the files in the folder updated in 2019.
The feedback from the command window looks like this:
info: This is OpenGeoSys-6 version 6.2.1.
info: OGS started on 2020-03-10 22:50:00-0400.
warning: Consider switching from mesh and geometry input to multiple meshes input. See https://www.opengeosys.org/docs/tools/model-preparation/constructmeshesfromgeometry/ tool for conversion.
warning: Found a nonlinear node whose ID (4) is smaller than the number of base node IDs (55). Some functions may not work properly.
warning: Found a nonlinear node whose ID (4) is smaller than the number of base node IDs (77). Some functions may not work properly.
warning: Found a nonlinear node whose ID (3) is smaller than the number of base node IDs (94). Some functions may not work properly.
warning: Found a nonlinear node whose ID (7) is smaller than the number of base node IDs (95). Some functions may not work properly.
warning: Found a nonlinear node whose ID (10) is smaller than the number of base node IDs (54). Some functions may not work properly.
warning: Found a nonlinear node whose ID (5) is smaller than the number of base node IDs (30). Some functions may not work properly.
warning: Found a nonlinear node whose ID (13) is smaller than the number of base node IDs (100). Some functions may not work properly.
warning: Found a nonlinear node whose ID (10) is smaller than the number of base node IDs (147). Some functions may not work properly.
warning: Found a nonlinear node whose ID (6) is smaller than the number of base node IDs (480). Some functions may not work properly.
warning: Found a nonlinear node whose ID (6) is smaller than the number of base node IDs (478). Some functions may not work properly.
warning: Found a nonlinear node whose ID (11) is smaller than the number of base node IDs (100). Some functions may not work properly.
warning: Found a nonlinear node whose ID (9) is smaller than the number of base node IDs (51). Some functions may not work properly.
info: GroupBasedParameter: E
info: GroupBasedParameter: nu
info: GroupBasedParameter: k
info: GroupBasedParameter: phi
info: GroupBasedParameter: rho_solid
info: GroupBasedParameter: alpha
info: ConstantParameter: mu
info: ConstantParameter: rho_liquid
info: ConstantParameter: zero
info: ConstantParameter: initial_displacement
info: ConstantParameter: initial_pressure
info: No source terms for process variable ‘pressure’ found.
info: No source terms for process variable ‘displacement’ found.
error: ConfigTree: In file `C:\trial\3.7\project3\sample\hm1_3Dgravity.prj’ at path <processes/process>: Key <specific_storage> has not been found at ConfigTree.cpp, line 235
info: OGS terminated on 2020-03-10 22:50:00-0400.
error: OGS terminated with error.

And if I use the new code from Github which seems like being updated a month ago, the feedback looks like this:
info: This is OpenGeoSys-6 version 6.2.1.
info: OGS started on 2020-03-10 22:19:25-0400.
warning: Consider switching from mesh and geometry input to multiple meshes input. See https://www.opengeosys.org/docs/tools/model-preparation/constructmeshesfromgeometry/ tool for conversion.
warning: Found a nonlinear node whose ID (4) is smaller than the number of base node IDs (55). Some functions may not work properly.
warning: Found a nonlinear node whose ID (6) is smaller than the number of base node IDs (78). Some functions may not work properly.
warning: Found a nonlinear node whose ID (3) is smaller than the number of base node IDs (94). Some functions may not work properly.
warning: Found a nonlinear node whose ID (7) is smaller than the number of base node IDs (94). Some functions may not work properly.
warning: Found a nonlinear node whose ID (4) is smaller than the number of base node IDs (54). Some functions may not work properly.
warning: Found a nonlinear node whose ID (3) is smaller than the number of base node IDs (30). Some functions may not work properly.
warning: Found a nonlinear node whose ID (11) is smaller than the number of base node IDs (100). Some functions may not work properly.
warning: Found a nonlinear node whose ID (13) is smaller than the number of base node IDs (147). Some functions may not work properly.
warning: Found a nonlinear node whose ID (13) is smaller than the number of base node IDs (479). Some functions may not work properly.
warning: Found a nonlinear node whose ID (13) is smaller than the number of base node IDs (479). Some functions may not work properly.
warning: Found a nonlinear node whose ID (12) is smaller than the number of base node IDs (52). Some functions may not work properly.
info: ConstantParameter: E
info: ConstantParameter: nu
info: GroupBasedParameter: k
info: ConstantParameter: zero
info: ConstantParameter: initial_displacement
info: ConstantParameter: initial_pressure
info: No source terms for process variable ‘pressure’ found.
info: No source terms for process variable ‘displacement’ found.
error: ConfigTree: In file C:\trial\3.7\project3\sample\hm1_3Dgravity.prj' at path <media/medium>: Value for XML attribute 'id' 0,1,2,3’ not convertible to the desired type. at ConfigTree.cpp, line 235
info: OGS terminated on 2020-03-10 22:19:26-0400.
error: OGS terminated with error.

Since the book mentioned that the version it applied was OGS 5.5, if I tried the project file with it, it didn’t give me any feedback.
Most of the project under Tests\Data\HydroMechanics\Verification has the same “Key <specific_storage> has not been found at ConfigTree.cpp, line 235” problem. What is wrong with those project files? Can someone help me with it?

Some days ago the modelling using specific storage was substituted by using fluid compressibility. As a consequence, the project files have been changed, too. If you can use OGS version 6.3 all should work.