message: fixed DIRK coefficients
diff: @@ -2249,7 +2249,10 @@ void TACSDIRKIntegrator::setupDefaultCoeffs(){
  */
  double TACSDIRKIntegrator::getACoeff( const int i, const int j ){
  if (i < num_stages && j < num_stages){
  - if (i <= j){
  + if (j > i){
  + return 0.0;
  + }
  + else {
  int index = getRowIndex(i);
  return a[index + j];
  }
  