Error when using blockSQP solver

[vietanhle0101]

I met the following error when trying to use blocksqp solver.

File "/home/vietanhle/.local/lib/python2.7/site-packages/casadi/casadi.py", line 27233, in solve
    return _casadi.Opti_solve(self, *args)
RuntimeError: Error in Opti::solve [OptiNode] at .../casadi/core/optistack.cpp:159:
.../casadi/core/plugin_interface.hpp:322: Assertion "handle!=nullptr" failed:
PluginInterface::load_plugin: Cannot load shared library 'libcasadi_linsol_ma27.so': 
   (
    Searched directories: 1. casadipath from GlobalOptions
                          2. CASADIPATH env var
                          3. PATH env var (Windows)
                          4. LD_LIBRARY_PATH env var (Linux)
                          5. DYLD_LIBRARY_PATH env var (osx)
    A library may be 'not found' even if the file exists:
          * library is not compatible (different compiler/bitness)
          * the dependencies are not found
   )
  Tried '/home/vietanhle/.local/lib/python2.7/site-packages/casadi' :
    Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory
  Tried '' :
    Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory
  Tried '.' :
    Error code: ./libcasadi_linsol_ma27.so: cannot open shared object file: No such file or directory

I have not installed sparse solver MA57 from HSL yet. Is there any way to use blocksqp without MA57?

[djanka2]

Sorry for the late reply. It looks like you are using Casadi which uses a modified version of blockSQP (which is distributed with Casadi as far as I know). Please check with the Casadi developers regarding the error. That being said, MA57 is no prerequisite to run blockSQP. It can also be used with the dense version of qpOASES. Am So., 31. Mai 2020 um 07:50 Uhr schrieb vietanhle0101 < notifications@github.com>:

…

I met the following error when trying to use blocksqp solver. File "/home/vietanhle/.local/lib/python2.7/site-packages/casadi/casadi.py", line 27233, in solve return _casadi.Opti_solve(self, *args) RuntimeError: Error in Opti::solve [OptiNode] at .../casadi/core/optistack.cpp:159: .../casadi/core/plugin_interface.hpp:322: Assertion "handle!=nullptr" failed: PluginInterface::load_plugin: Cannot load shared library 'libcasadi_linsol_ma27.so': ( Searched directories: 1. casadipath from GlobalOptions 2. CASADIPATH env var 3. PATH env var (Windows) 4. LD_LIBRARY_PATH env var (Linux) 5. DYLD_LIBRARY_PATH env var (osx) A library may be 'not found' even if the file exists: * library is not compatible (different compiler/bitness) * the dependencies are not found ) Tried '/home/vietanhle/.local/lib/python2.7/site-packages/casadi' : Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory Tried '' : Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory Tried '.' : Error code: ./libcasadi_linsol_ma27.so: cannot open shared object file: No such file or directory I have not installed sparse solver MA57 from HSL yet. Is there any way to use blocksqp without MA57? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#4>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADWOLIRYVV4J24YG5FX2QYTRUHVYXANCNFSM4NPAO7KA> .

[djanka2]

Hi, this is maybe not relevant to you anymore but I just used Casadi with blockSQP. To use the dense version (without MA57 or MA27) you need to pass the option {"schur": False} to blockSQP. Here is a working example (adapted from the Casadi docs) that shows how to do it: from casadi import * x = MX.sym('x',2); # Two states p = MX.sym('p'); # Free parameter # Expression for ODE right-hand side z = 1-x[1]**2; rhs = vertcat(z*x[0]-x[1]+2*tanh(p),x[0]) # ODE declaration with free parameter ode = {'x':x,'p':p,'ode':rhs} # Construct a Function that integrates over 1s F = integrator('F','cvodes',ode,{'tf':1}) # Control vector u = MX.sym('u',4,1) x = [0,1] # Initial state for k in range(4): # Integrate 1s forward in time: # call integrator symbolically res = F(x0=x,p=u[k]) x = res["xf"] # NLP declaration nlp = {'x':u,'f':dot(u,u),'g':x}; # Solve using blockSQP solver = nlpsol('solver','blocksqp',nlp,{"schur": False}) res = solver(x0=0.2,lbg=0,ubg=0) Am Mi., 12. Aug. 2020 um 15:21 Uhr schrieb Dennis Janka < dennisjanka@gmail.com>:

…

Sorry for the late reply. It looks like you are using Casadi which uses a modified version of blockSQP (which is distributed with Casadi as far as I know). Please check with the Casadi developers regarding the error. That being said, MA57 is no prerequisite to run blockSQP. It can also be used with the dense version of qpOASES. Am So., 31. Mai 2020 um 07:50 Uhr schrieb vietanhle0101 < ***@***.***>: > I met the following error when trying to use blocksqp solver. > > File "/home/vietanhle/.local/lib/python2.7/site-packages/casadi/casadi.py", line 27233, in solve > return _casadi.Opti_solve(self, *args) > RuntimeError: Error in Opti::solve [OptiNode] at .../casadi/core/optistack.cpp:159: > .../casadi/core/plugin_interface.hpp:322: Assertion "handle!=nullptr" failed: > PluginInterface::load_plugin: Cannot load shared library 'libcasadi_linsol_ma27.so': > ( > Searched directories: 1. casadipath from GlobalOptions > 2. CASADIPATH env var > 3. PATH env var (Windows) > 4. LD_LIBRARY_PATH env var (Linux) > 5. DYLD_LIBRARY_PATH env var (osx) > A library may be 'not found' even if the file exists: > * library is not compatible (different compiler/bitness) > * the dependencies are not found > ) > Tried '/home/vietanhle/.local/lib/python2.7/site-packages/casadi' : > Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory > Tried '' : > Error code: libcoinhsl.so.0: cannot open shared object file: No such file or directory > Tried '.' : > Error code: ./libcasadi_linsol_ma27.so: cannot open shared object file: No such file or directory > > I have not installed sparse solver MA57 from HSL yet. Is there any way to > use blocksqp without MA57? > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <#4>, or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ADWOLIRYVV4J24YG5FX2QYTRUHVYXANCNFSM4NPAO7KA> > . >