Loading Waveform Files

NovyWave supports loading multiple waveform files simultaneously, making it easy to correlate signals from different simulations or design partitions.

Related Pages

• Supported Formats for format tradeoffs and generation commands
• Multi-File Workflows for time alignment and comparison strategies

Loading Files

Using the File Dialog

1. Click Load Files in the Files & Scopes panel header
2. Navigate to your waveform files
3. Select one or more files
4. Click Load or press Enter

Working with Loaded Files

File Tree Structure

Loaded files appear in the Files & Scopes panel as a tree:

design.vcd (0-100ns)
  └── TOP
      ├── cpu
      │   └── alu
      └── memory

Each file shows:

• File name with disambiguation path if needed
• Time span such as 0-100ns
• Expandable hierarchy of scopes and modules

Selecting Scopes

Click the checkbox next to a scope to select it. The Variables panel then shows signals from the currently selected scope.

Expanding and Collapsing

• click the chevron to expand or collapse a scope
• expansion state is preserved between sessions

Removing Files

• click the X button on a file row to remove it
• use Remove All in the header to clear all files

File Disambiguation

When two files share the same name, NovyWave adds path prefixes so the tree and selected-variable list remain readable:

project/module_a/test.vcd  →  module_a/test.vcd
project/module_b/test.vcd  →  module_b/test.vcd

Troubleshooting

File Won’t Load

• check the file format is supported
• ensure the file is not corrupted or truncated
• confirm the file permissions allow access

Slow Loading

Large files may take a few seconds to parse. Consider using FST format instead of VCD for smaller files and faster loading.

Missing Signals

• expand the file tree to find scopes
• use the Variables search box to filter
• confirm the correct scope is selected