2noise/ChatTTS · error · ValueError

Out of memory! No free blocks are available.

Error message

Out of memory! No free blocks are available.

What it means

Error "Out of memory! No free blocks are available." thrown in 2noise/ChatTTS.

Source

Thrown at ChatTTS/model/velocity/block_manager.py:42

        device: Device,
        block_size: int,
        num_blocks: int,
    ) -> None:
        self.device = device
        self.block_size = block_size
        self.num_blocks = num_blocks

        # Initialize the free blocks.
        self.free_blocks: BlockTable = []
        for i in range(num_blocks):
            block = PhysicalTokenBlock(
                device=device, block_number=i, block_size=block_size
            )
            self.free_blocks.append(block)

    def allocate(self) -> PhysicalTokenBlock:
        if not self.free_blocks:
            raise ValueError("Out of memory! No free blocks are available.")
        block = self.free_blocks.pop()
        block.ref_count = 1
        return block

    def free(self, block: PhysicalTokenBlock) -> None:
        if block.ref_count == 0:
            raise ValueError(f"Double free! {block} is already freed.")
        block.ref_count -= 1
        if block.ref_count == 0:
            self.free_blocks.append(block)

    def get_num_free_blocks(self) -> int:
        return len(self.free_blocks)


class AllocStatus(enum.Enum):
    """Result for BlockSpaceManager.can_allocate

View on GitHub (pinned to 77b89ee281)

When it happens

Trigger: Thrown at ChatTTS/model/velocity/block_manager.py:42 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of 2noise/ChatTTS@77b89ee281 (2026-08-26). Data as JSON: /api/errors/13c5d0d98873550a. Report an issue: GitHub.