Function Syntax: CHKFILE Version: 1.0 Date: 26.09.2025 8:26:15AM Version: 1.0 Date: 11.08.2026 3:15:09PM AI Description 🧩 CheckLspFile is an AutoCAD AutoLISP diagnostic utility for scanning a selected LSP source file for reader level syntax errors. 📂 The command opens a file selection dialog rooted in a predefined @try folder and allows the user to select an LSP file for validation. 🧪 The routine reads the file one line at a time and tests each line with the AutoLISP read function inside protected error handling. Function Syntax Main command: CHKFILE Primary Workflow 1. Run CHKFILE from the AutoCAD command line. 2. Choose an LSP file from the predefined @try source folder. 3. The routine reads the selected file line by line. 4. Each individual line is passed to read through vl-catch-all-apply. 5. Scanning stops at the first trapped reader error. 6. AutoCAD reports the problem line and the corresponding reader error or reports that no reader errors were found. Functionalities ✅ LSP file selection - lets the user choose an AutoLISP source file through getfiled. ✅ Line by line scanning - processes the selected source one line at a time. ✅ Protected reader test - uses vl-catch-all-apply around the AutoLISP read function. ✅ First error detection - stops when the first reader error is encountered. ✅ Line number reporting - reports the source line where the reader problem was detected. ✅ Problem text output - prints the offending source line for faster troubleshooting. ✅ Reader error message - prints the trapped Visual LISP error message when available. Important Notes ⚠️ The source folder is hard coded to a specific @try directory. ⚠️ CHKFILE checks each source line independently so it is not a complete parser for expressions that intentionally span multiple lines. ⚠️ A reported reader error can therefore require manual review before deciding that the complete LISP file is invalid. ⚠️ The routine does not modify the selected source file. SEO Keywords 🏷️ AutoCAD 🏷️ Civil 3D 🏷️ AutoLISP 🏷️ LISP validation 🏷️ LSP checker 🏷️ Reader error 🏷️ Syntax diagnostics 🏷️ vl-catch-all-apply 🏷️ AutoCAD troubleshooting 🏷️ CAD diagnostics