Hi Krishna, if a loaf never rises, it can be due to a few things. It could be that the yeast was dead, either from shelf life or it was added to water that was too hot. The dough may have had too much flour in it so it couldn't properly hydrate, which is why we recommend measuring by weight whenever possible. Or the dough may have been under-proofed or even over-proofed if it had risen outside of the oven and then collapsed. 

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