# FAQs ## Why does Metamask fail in sending transactions in dev environment with a nonce error? Everytime the dev environment is started, a new local test chain is started. Metamask internally maintains a cache of "latest block number" and "account transaction nonce". Since every run of `dev` creates a new chain, it never matches with this cache. To know how to clear the cache, [read this](https://support.metamask.io/hc/en-us/articles/360015488891-How-to-clear-your-account-activity-reset-account). ## Why does Metamask fail in sending transactions with a nonce error when using "reset on change" option in dev environment? The reset on change option resets the blockchain on every code change. Metamask internally maintains a cache of "latest block number" and "account transaction nonce". After resetting the chain, the latest block number and account transaction nonce should go back to initial state as well, but Metamask does not update this cache on its own. To know how to clear the cache, [read this](https://support.metamask.io/hc/en-us/articles/360015488891-How-to-clear-your-account-activity-reset-account). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://0xpolygon.gitbook.io/dapp-launchpad/faqs.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.