can't use hamming window to design bandpass signal with designfilt

here is the FIR passband I want to design

• lower stopband edge: 0.3π
• upper stopband edge: 0.6π
• lower passband edge: 0.4π
• upper passband edge: 0.5π
• stopband attenuation As = 50 dB
• passband ripple Rp = 0.5 dB

here is the code I use

bpFilt = designfilt('bandpassfir','PassbandFrequency1',0.4,'PassbandFrequency2',0.5,'StopbandFrequency1',0.3,'StopbandFrequency2',0.6,'PassbandRipple',0.5,'StopbandAttenuation1',50,'StopbandAttenuation2',50,'DesignMethod','Window','hamming');
fvtool(bpFilt)
dataIn = randn(1000,1);
dataOut = filter(bpFilt,dataIn);

Here is the error I got

Error using designfilt>parseAndDesignFilter (line 489)
All inputs except the filter response must be in the form of name-value pairs.

Error in designfilt (line 213)
  [err,requestedResponse,parseParams,h] = parseAndDesignFilter(inputParamValueNames, varargin{:});

Error in HW7_prob1 (line 1)
bpFilt =
designfilt('bandpassfir','PassbandFrequency1',0.4,'PassbandFrequency2',0.5,'StopbandFrequency1',0.3,'StopbandFrequency2',0.6,'PassbandRipple',0.5,'StopbandAttenuation1',50,'StopbandAttenuation2',50,'DesignMethod','Window','hamming');