Interface changes between SCIP 3.2 and SCIP 4.0

New and changed callbacks

• Constraint Handlers:

  • new optional callback CONSENFORELAX to enforce a relaxation solution, see How to add constraint handlers
  • added argument "infeasible" to CONSINITLP

  
  

• Concurrent SCIP:

  • extended interface to support concurrent solving mode

  
  

• Message Handler:

  
  

• Variable Pricers:

  
  

• Primal Heuristics:

Changed interface methods

• Copying:

  • added arguments "fixedvars", "fixedvals", "nfixedvars" to SCIPcopyVars()
  • added arguments "fixedvars", "fixedvals", "nfixedvars" to SCIPcopyOrigVars()
  • renamed argument "success" to valid in SCIPgetConsCopy()

  
  

• Parameters:

  • renamed method SCIPcheckBoolParam() to SCIPisBoolParamValid()
  • renamed method SCIPcheckLongintParam() to SCIPisLongintParamValid()
  • renamed method SCIPcheckRealParam() to SCIPisRealParamValid()
  • renamed method SCIPcheckCharParam() to SCIPisCharParamValid()
  • renamed method SCIPcheckStringParam() to SCIPisStringParamValid()

  
  

• Relaxators:

  • added argument "includeslp" to SCIPincludeRelax() and SCIPincludeRelaxBasic()

  
  

• Primal Heuristics:
  • introduced new type SCIP_HEURTIMING for primal heuristic timing masks
  • changed type of argument "timingmask" from unsigned int to SCIP_HEURTIMING in SCIPincludeHeur(), SCIPincludeHeurBasic()
  • added argument "initialseed" to SCIPcreateDiveset()
    

• Reoptimization:

  • renamed function SCIPgetReopSolsRun() to SCIPgetReoptSolsRun()

  
  

• Variables:

  • Removed method SCIPvarGetNBinImpls()

  
  

• Conflict Analysis:

  • added arguments "conftype" and "iscutoffinvolved" to SCIPinitConflictAnalysis()

  
  

• Constraint Handlers:

  • added argument "infeasible" to SCIPinitlpCons()

  
  

• Nonlinear Relaxation:

  • added argument "curvature" to SCIPcreateNlRow()

  
  

• Solutions:
  • added argument "completely" to SCIPtrySol(), SCIPtrySolFree(), SCIPcheckSol()
• Hashmap and Hashtable:
  • removed function SCIPcalcHashtableSize() since not required anymore for SCIP_HASHTABLE and SCIP_HASHMAP
  • based on the initial size SCIP_HASHTABLE and SCIP_HASHMAP choose an appropriate size internally to allow insertion of that many elements without resizing
  • SCIP_MULTIHASH behaves like the old SCIP_HASHTABLE and SCIPcalcMultihashSize() should be used as replacement for SCIPcalcHashtableSize()

For further information we refer to the Release notes and the Changelog.