function solve(md,solutionenum){
//SOLVE - apply solution sequence for this model
//
//   Usage:
//      solve(md,solutionenum,varargin)
//      where varargin is a lit of paired arguments of string OR enums
//
//   solution types available comprise:
//		 - StressbalanceSolutionEnum
//		 - MasstransportSolutionEnum
//		 - ThermalSolutionEnum
//		 - SteadystateSolutionEnum
//		 - TransientSolutionEnum
//		 - BalancethicknessSolutionEnum
//		 - BedSlopeSolutionEnum
//		 - SurfaceSlopeSolutionEnum
//		 - HydrologySolutionEnum
//		 - FlaimSolutionEnum
//
//  extra options:
//      - loadonly    : does not solve. only load results
//      - runtimename : true or false (default is true), makes name unique
//      - checkconsistency : 'yes' or 'no' (default is 'yes'), ensures checks on consistency of model
//      - restart: 'directory name (relative to the execution directory) where the restart file is located.
//      - callback: callback function to be called upon receiving the results from the server, or local computations. 
//
//   Examples:
//      md=solve(md,StressbalanceSolutionEnum);

	solutionstring=EnumToString(solutionenum);
	
	//recover and process solve options
	if (solutionstring.slice(-8) !== 'Solution'){
		throw Error(sprintf("%s%s%s\n",'solutionenum ',solutionstring,' not supported!'));
	}
	
	//Process options
	var args = Array.prototype.slice.call(arguments);
	var options = new pairoptions(args.slice(2,args.length));
	options.addfield('solutionenum',solutionenum);

	//recover some fields
	md.priv.solution=solutionenum;
	cluster=md.cluster;

	//check model consistency
	if (options.getfieldvalue('checkconsistency','yes') == 'yes'){
		if (md.verbose.solution){
			console.log('checking model consistency');
		}
		if (solutionenum == FlaimSolutionEnum()){
			md.priv.isconsistent=true;
			md.mesh.checkconsistency(md,solutionenum);
			md.flaim.checkconsistency(md,solutionenum);
			if (md.priv.isconsistent==false){
				throw error('solve error message: model not consistent, see messages above');
			}
		}
		else{
			ismodelselfconsistent(md);
		}
	}

	//If we are restarting, actually use the provided runtime name:
	restart=options.getfieldvalue('restart','');

	//First, build a runtime name that is unique
	if (restart==1 ){
		//Leave the runtimename as is
		}
	else{
		if (!(restart == '')){
			md.priv.runtimename=restart;
		}
		else if (options.getfieldvalue('runtimename',true)){
			c=new Date().getTime();
			md.priv.runtimename=sprintf('%s-%g',md.miscellaneous.name,c);
		}
		else{
			md.priv.runtimename=md.miscellaneous.name;
		}
	}

	//if running qmu analysis, some preprocessing of dakota files using models
	//fields needs to be carried out. 
	if (md.qmu.isdakota){
		throw Error("solve error message: qmu runs not supported yet!");
		//md.preqmu(options);
	}


	//Do we load results only?
	if (options.getfieldvalue('loadonly',false)){
		loadresultsfromcluster(md);
		return;
	}

	//Marshall into a binary array (fid) all the fields of model.
	var fid = marshall(md);                                          // bin file
	
	//deal with toolkits options: 
	toolkitsstring= md.toolkits.ToolkitsFile(md.miscellaneous.name + '.toolkits'); // toolkits file

	//callback function: 
	function callbackfunction(){solving=false;}; //default, do nothing if no callback function requested.
	if (options.getfieldvalue('callbackfunction',false)){
		callbackfunction=options.getfieldvalue('callbackfunction');
	}
	
	//callback error function: 
	function callbackerrorfunction(){solving=false;}; //default, do nothing if no callback function requested.
	if (options.getfieldvalue('callbackerrorfunction',false)){
		callbackerrorfunction=options.getfieldvalue('callbackerrorfunction');
	}
	
	//callback id: 
	var callbackid = '.run-button'; //default, update .run-button elements with progress updates.
	if (options.getfieldvalue('callbackid',false)){
		callbackid=options.getfieldvalue('callbackid');
	}

	if (cluster.classname() == 'local'){  //{{{

		/*We are running locally on the machine, using the issm module:*/
		console.log('running issm locally');
		
		//Call issm:
		var outputs = issm(fid, toolkitsstring, solutionstring, md.miscellaneous.name); 
		
		//Recover output arguments: 
		var outputbuffer = outputs[0]; var outputbuffersize = outputs[1];
			
		//Load results: 
		md = loadresultsfrombuffer(md,outputbuffer,outputbuffersize); 
		
		//Call back? 
		callbackfunction();

		return md;

	} //}}}
	else { //{{{

		/*We are running somewhere else on a computational server. Send the buffer to that server and retrieve output: */
		cluster.UploadAndRun(md,callbackfunction,callbackerrorfunction,callbackid,fid,toolkitsstring,solutionstring,md.miscellaneous.name,md.priv.runtimename);

		return md;

	} //}}}
}