[Python] Vivado Block Memory Generator IP not accepting COE file

Here is my python script to generate a COE file:

import numpy as np

def generate_coe_file(filename, data_list, radix=16):
with open(filename, 'w') as f:
f.write(f"memory_initialization_radix = {radix};\n")
f.write("memory_initialization_vector =\n")
for i, val in enumerate(data_list):
if i == len(data_list) - 1:
f.write(f"{val};\n") # Last value ends with ;
else:
f.write(f"{val},\n")

# Example: Fill with values 0 to 255
data = list(np.ones(1024))
data = [hex(int(x)) for x in data]
generate_coe_file("fft_bram.coe", data)


I tried switching directories, changing filenames and looking for extra whitespaces/commas/semicolons, All that is generated fine but the Re-Customize IP pop-up window for the Xilinx Vivado Block Memory Generator IP module does not accept the COE file and returns the following Error Message:

Validation failed for parameter 'Coe File(Coe_File)' with current value 'd:/Vivado_Vitis_Projects/SingleToneFFT/SingleToneFFT.srcs/source_1/bd/design_singletoneFFT/ip/design_singletoneFFT_blk_mem_gen_0_0'. Invalid COE File- Invalid Hex value detected in the COE File: x1


The Block memory IP module is initialized as a true dual port BRAM in Standalone mode, with 32 bit read and write widths and 1024 read and write depth.

Can someone guide me on mitigating this error.

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