Developer Errors
Exact command-line, build, SDK and database errors with short diagnostic paths and verification.
npm command not found
Confirm whether npm is installed, available on PATH and visible to the current shell.
SignTool.exe not found
Locate the Windows SDK copy before editing PATH or reinstalling build tools.
Plugin with id 'com.android.application' not found
Fix Gradle plugin repositories and project-level Android plugin resolution.
Debug Assertion Failed in C++
Read the failed assertion, source file and line before changing runtimes.
Hadoop command not found
Verify the Hadoop distribution first, then correct HADOOP_HOME and PATH.
Invalid column name in SQL Server
Check the actual schema, query scope and object being queried before rewriting the statement.
MySQL failed to open file — error 2
Check server-vs-client path context, LOCAL and secure_file_priv.
JavaScript ReferenceError: x is not defined
Check spelling, scope and script/module load order before changing unrelated code.
JavaScript TypeError: x is not a function
Inspect the runtime value and import/object shape before rewriting the call.
Android SDK location not found
Verify the local SDK and correct sdk.dir in local.properties.