The input data block in position 11 does not exist, means the DMAP module was expecting and input data but was not found at the time of it execution or was not created. Generally, these types of error are likely due to DMAP errors. You are using BAR elements. Try using NASTRAN BARMASS=1, I don't think it may resolve the DMAP FATAL but may avoid some massless mechanisms.
See comment in the QRG:
Allows the user to select the bar torsional mass moment of inertia.
If set to 0, request the pre-MSC Nastran 2004 (Default = 0).
If set to greater than 0, the torsional mass moment of inertia term
is included in the mass matrix formulation of bar elements. For
both values of COUPMASS, the torsional inertia is added.
For COUPMASS = 1, the axial mass will be consistent rather than
coupled.
You may also want to contact support and send them the bdf. These error generally end up being DMAP issues which may have to be corrected in subsequent versions.
The input data block in position 11 does not exist, means the DMAP module was expecting and input data but was not found at the time of it execution or was not created. Generally, these types of error are likely due to DMAP errors. You are using BAR elements. Try using NASTRAN BARMASS=1, I don't think it may resolve the DMAP FATAL but may avoid some massless mechanisms.
See comment in the QRG:
Allows the user to select the bar torsional mass moment of inertia.
If set to 0, request the pre-MSC Nastran 2004 (Default = 0).
If set to greater than 0, the torsional mass moment of inertia term
is included in the mass matrix formulation of bar elements. For
both values of COUPMASS, the torsional inertia is added.
For COUPMASS = 1, the axial mass will be consistent rather than
coupled.
You may also want to contact support and send them the bdf. These error generally end up being DMAP issues which may have to be corrected in subsequent versions.