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Hello stko team,
I want to run the analysis, but only mpco.cdata comes out. The mpco file doesn't appear, even though Opensees is linked correctly.
Do you have any idea what might be causing this?

Best regards

Did you check if there was an error during the analysis? It might have failed before creating the output database. Also, make sure you placed the database command before the analysis command - note that the mpco recorder command only records analysis steps that occur after it has been added to the list of commands.

Hi,
thank you very much for your reply. This error occurs because of the server I was connected to.

Best regards

You're welcome

can i get help to solve this (
WARNING - ForceBeamColumn3d::update - failed to get compatible element forces & deformations for element: 24(dW: << -nan(ind), dW0: 9.03352e+06)
Domain::update - domain failed in update
DisplacementControl::newStep - model failed to update for new dU
StaticAnalysis::analyze() - the Integrator failed at step: 0 with domain at load factor 705737
OpenSees > analyze failed, returned: -2 error flag
ERROR: the analysis did not converge
while executing
"error "ERROR: the analysis did not converge""
("for" body line 60)
invoked from within
"for {set i 1} {$i <= $ncycles} {incr i} {
set itime [lindex $time $i]
set itime_old [lindex $time [expr $i-1]]
set iU [lindex $U $i]
set iU_old [l..."
(file "analysis_steps.tcl" line 162)
invoked from within
"source analysis_steps.tcl"
(file ".\main.tcl" line 81)) i just run exist model from STKO

WARNING - ForceBeamColumn3d::update - failed to get compatible element forces & deformations for element: 24(dW: << -nan(ind), dW0: 9.03352e+06)

This means that your force-based beam element could not solve the internal iterations (to find compatible deformation). This typically happens when your sections becomes unstable (failure of some materials or zero-tangent)