# Error Fixes Summary
## Overview
Fixed four critical errors in the After Effects MCP integration that were causing syntax errors and runtime failures.
## Fixed Issues
### 1. apply_effect SyntaxError
**Error**: `SyntaxError: Expected: )`
**Root Cause**: Incorrect quote escaping in error messages within generated ExtendScript
**Fix**: Updated quote escaping from 2 backslashes (`\\"`) to 4 backslashes (`\\\\"`) in TypeScript source code, which correctly produces escaped quotes in the generated ExtendScript
**Files Modified**:
- `src/ae-integration/generators/effectsAndKeyframeGenerators.ts` (lines 53, 57)
### 2. modify_text_properties "Text layer not found" Error
**Error**: `Error: Text layer not found`
**Root Cause**: Generic error message didn't help identify whether the layer didn't exist or wasn't a text layer
**Fix**: Enhanced error messages to be more specific:
- Now differentiates between missing layers and non-text layers
- Provides the actual layer type when attempting to modify non-text layers
**Files Modified**:
- `src/ae-integration/generators/textGenerators.ts` (multiple functions)
### 3. apply_easy_ease SyntaxError
**Error**: `SyntaxError: Expected: )`
**Root Cause**: Similar quote escaping issue in error messages
**Fix**: Updated quote escaping from 2 to 4 backslashes in keyframe-related error messages
**Files Modified**:
- `src/ae-integration/generators/keyframeGenerators.ts` (line 251)
## ES3 Compatibility Rules Applied
According to CLAUDE.md, all generated ExtendScript must follow ES3 compatibility:
- **Escape quotes properly**: Use `\\\\"` for quotes inside generated error messages (4 backslashes in source code)
- This produces `\\"` in the generated string, which then produces `"` in the final ExtendScript
- No template literals, arrow functions, const/let, or other ES6+ features
## Test Coverage
Added comprehensive unit tests in `src/tests/error-fixes.test.ts` to ensure:
1. Proper quote escaping in all error messages
2. ES3 compatibility of generated scripts
3. Correct error handling and messaging
4. All three fixes work together without conflicts
All tests are passing successfully.
### 4. reorder_layers "New index out of range" Error
**Error**: `Error: New index out of range`
**Root Cause**: Generic error message didn't provide context about what the valid range is
**Fix**: Enhanced error message to include:
- The invalid index that was requested
- The valid range (1 to number of layers)
- The total number of layers in the composition
**Files Modified**:
- `src/ae-integration/generators/layerGenerators.ts` (line 389)
- `src/server/tools/layerTools.ts` (lines 268, 272) - Updated documentation
**Example**:
- Before: `Error: New index out of range`
- After: `Error: New index 5 is out of range. Valid range is 1 to 4 (composition has 4 layers)`
