# ValueError: Requested fields not available for output **URL:** \ **Category:** PyLith\ **Created:** [September 19, 2025, 12:08pm UTC](https://community.geodynamics.org/t/valueerror-requested-fields-not-available-for-output/4297 "2025-09-19T12:08:19Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Dyrussss](https://avatars.discourse-cdn.com/v4/letter/d/c89c15/32.png) [@Dyrussss](https://community.geodynamics.org/u/Dyrussss)\ **Post date:** [September 19, 2025, 12:08pm UTC](https://community.geodynamics.org/t/valueerror-requested-fields-not-available-for-output/4297/1 "2025-09-19T12:08:20Z")
Dear pylith team, I am working based on step03 in subduction-2d. I am trying to simulate several seismic cycles, but encountered the following error: ValueError: Requested fields not available for output. Data provider: ‘faultcohesivekin’ Field type: ‘vertex’ Data type: ‘info’ Available fields: ‘normal\_dir’ ‘final\_slip’ ‘slip\_time’ ‘final\_slip\_eq1’ ‘slip\_time\_eq1’ ‘final\_slip\_eq2’ ‘slip\_time\_eq2’ ‘final\_slip\_creep’ ‘slip\_time\_creep’ ‘strike\_dir’ Fields not available: ‘final\_slip\_rupture’ ‘slip\_time\_rupture’ application called MPI\_Abort(MPI\_COMM\_WORLD, -1) - process 0 /home/crl/Desktop/pylith/pylith-2.2.2-linux-x86\_64/bin/nemesis: mpirun: exit 255 My .cfg file: # Set earthquake sources to an array consisting of creep and 3 ruptures. eq\_srcs = [creep,eq1,eq2] eq\_srcs.creep.origin\_time = 0.0_year eq\_srcs.eq1.origin\_time = 150.0_year eq\_srcs.eq2.origin\_time = 300.0\*year # Coseismic eq1 --------- [pylithapp.timedependent.interfaces.fault\_locked.eq\_srcs.eq1.slip\_function] slip.iohandler.filename = fault\_slip\_coseismic.spatialdb slip.query\_type = linear slip.label = Final\_slip\_eq1 # Slip time (relative to origin time) is uniform, so use UniformDB for convenience slip\_time = spatialdata.spatialdb.UniformDB slip\_time.label = Slip\_time\_eq1 slip\_time.values = [slip-time] slip\_time.data = [0.0\*year] # Coseismic eq2 --------- [pylithapp.timedependent.interfaces.fault\_locked.eq\_srcs.eq2.slip\_function] slip.iohandler.filename = fault\_slip\_coseismic.spatialdb slip.query\_type = linear slip.label = Final\_slip\_eq2 # Slip time (relative to origin time) is uniform, so use UniformDB for convenience slip\_time = spatialdata.spatialdb.UniformDB slip\_time.label = Slip\_time\_eq2 slip\_time.values = [slip-time] slip\_time.data = [0.0\*year] # Creep --------- [pylithapp.timedependent.interfaces.fault\_locked.eq\_srcs.creep] slip\_function = pylith.faults.ConstRateSlipFn # The slip time and final slip are defined in spatial databases. [pylithapp.timedependent.interfaces.fault\_locked.eq\_srcs.creep.slip\_function] slip\_rate.iohandler.filename = fault\_locked.spatialdb slip\_rate.query\_type = linear slip\_rate.label = Final slip # Slip time is uniform, so use UniformDB for convenience slip\_time = spatialdata.spatialdb.UniformDB slip\_time.label = Slip time slip\_time.values = [slip-time] slip\_time.data = [0.0\*year] # ---------------------------------------------------------------------- # output # ---------------------------------------------------------------------- # Domain [pylithapp.problem.formulation.output.domain] writer.filename = output/step03.h5 # Ground surface [pylithapp.problem.formulation.output.subdomain] writer.filename = output/step03-groundsurf.h5 # Faults #[pylithapp.problem.interfaces.fault\_locked.output] writer = pylith.meshio.DataWriterHDF5 writer.filename = output/step03-fault-locked.h5 # Materials [pylithapp.timedependent.materials.concrust.output] writer.filename = output/step03-concrust.h5 [pylithapp.timedependent.materials.conmantle.output] writer.filename = output/step03-conmantle.h5 [pylithapp.timedependent.materials.oceancrust.output] writer.filename = output/step03-oceancrust.h5 [pylithapp.timedependent.materials.oceanmantle.output] writer.filename = output/step03-oceanmantle.h5 # End of file Thank you very much for any help. ---
**Author:** ![baagaard](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/baagaard/32/615_2.png) [@baagaard](https://community.geodynamics.org/u/baagaard)\ **Post date:** [September 19, 2025, 7:41pm UTC](https://community.geodynamics.org/t/valueerror-requested-fields-not-available-for-output/4297/2 "2025-09-19T19:41:15Z")
> Available fields: ‘normal\_dir’ ‘final\_slip’ ‘slip\_time’ ‘final\_slip\_eq1’ ‘slip\_time\_eq1’ ‘final\_slip\_eq2’ ‘slip\_time\_eq2’ ‘final\_slip\_creep’ ‘slip\_time\_creep’ ‘strike\_dir’ > Fields not available: ‘final\_slip\_rupture’ ‘slip\_time\_rupture’ In PyLith v2 wIth multiple ruptures, the default values for the `info_fields` will not work, so you should specify what values you want in the `info` files. I would put all of the ones available (as given in the error message). ```cfg [pylithapp.problem.interfaces.fault_locked.output] vertex_info_fields = [normal_dir, final_slip, slip_time, final_slip_eq1, slip_time_eq1, final_slip_eq2, slip_time_eq2] ``` ---
**Author:** ![Dyrussss](https://avatars.discourse-cdn.com/v4/letter/d/c89c15/32.png) [@Dyrussss](https://community.geodynamics.org/u/Dyrussss)\ **Post date:** [September 20, 2025, 10:22am UTC](https://community.geodynamics.org/t/valueerror-requested-fields-not-available-for-output/4297/3 "2025-09-20T10:22:14Z")
Thank you for your valuable reply. The question has been resolved. Now I noticed that the groundsurf.h5 was not generated. What causes this problem? Thanks! ---
**Author:** ![Dyrussss](https://avatars.discourse-cdn.com/v4/letter/d/c89c15/32.png) [@Dyrussss](https://community.geodynamics.org/u/Dyrussss)\ **Post date:** [September 20, 2025, 12:45pm UTC](https://community.geodynamics.org/t/valueerror-requested-fields-not-available-for-output/4297/4 "2025-09-20T12:45:36Z")
I have solved this problem. Thanks again.