Error while bringing model references up to date

Hello,

Does anyone have any tips for me on how to resolve this error message below?

• ### Real-Time Workshop build procedure for model: 'model reference name' aborted due to an error.
• ??? Error using ==> 'name of .m function' at 492
• Error due to multiple causes:
• --> Error(s) encountered while building model
• "model reference name".
• --> Error while bringing model references of model 'top level model name' up to date:
• Error(s) encountered while building model "model reference name".

Caused by:

• Error using ==> '.m file' at 492
• Error(s) encountered while building model "model reference name"
• Error using ==> '.m file' at 492
• Error while bringing model references of model 'top level model name' up to date:
• Error(s) encountered while building model "model reference name"

Here are more details about what I'm doing:

• I'm running a .m file that calls the sim function to run a .mdl
• The .mdl has model references
• This function had been working in the past but it doesn't anymore
• I'm providing my inputs to the sim by making a numeric array inside my .m function
• I'm using Matlab 2009a
• I have more than one instance of the model reference on my path
• I provide the inputs to the model (i.e. ut) by making an array inside my .m function

I'm running my simulation with the following options:

options = simset(...
    'AbsTol','auto' ...
    ,'Debug','off' ...
    ,'Decimation', 1 ...
    ,'DstWorkspace', 'current' ...
    ,'FinalStateName', '' ...
    ,'FixedStep', 'auto' ...
    ,'InitialState', [] ...
    ,'MaxOrder', 5 ...
    ,'ConsecutiveZCsStepRelTol', 2.8422e-013 ...
    ,'MaxConsecutiveZCs', 1000 ...
    ,'SaveFormat', 'Array' ...
    ,'MaxDataPoints', 0 ...
    ,'MaxStep', 'auto' ...
    ,'MinStep', 'auto' ...
    ,'MaxConsecutiveMinStep', 1 ...
    ,'OutputPoints', 'all' ...
    ,'OutputVariables', 'ty' ...
    ,'Refine', 1 ...
    ,'RelTol', 0.001 ...
    ,'SrcWorkspace', 'base' ...
    ,'Trace', '' ...
    ,'ZeroCross', 'on' ...
    ,'SignalLogging', 'on' ...
    ,'SignalLoggingName', 'logsout' ...
    ,'ExtrapolationOrder', 4 ...
    ,'NumberNewtonIterations', 1 ...
    ,'TimeOut', [] ...
    ,'ConcurrencyResolvingToFileSuffix', [] ...
    ,'ReturnWorkspaceOutputs', [] ...
    ,'RapidAcceleratorUpToDateCheck', [] ...
    ,'RapidAcceleratorParameterSets', [] ...
    ,'Solver', 'VariableStepDiscrete' ...
    ,'InitialStep', 'auto' ...
    );