Errors seen when executing scripts that were generated using `--assemble` option.

[sangee2004]

Steps to reproduce the problem:

1. Use assemble option to generate gptscript for story-book-repo.gpt in examples/story-book .
   gptscript --assemble story-book.gpt > testassemble.gpt
2. Execute the generated gptscript from step1.
   gptscript testassemble.gpt

Following errors are seen when executing this script when attempting to download the files that were generated for the illustrations by image-generation tool.

Kt%2BhEX4%3D", "location": "pages/1.png"}
         content  [1] content | tool call download -> {"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-PaDOV3QCaWXAx9o2CcRrD6nt.png?st=2024-03-25T15%3A35%3A49Z&se=2024-03-25T17%3A35%3A49Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A28%3A50Z&ske=2024-03-25T21%3A28%3A50Z&sks=b&skv=2021-08-06&sig=scg8q2Eici0j7Vj4sqy5xVe4spi2eDPI0k8LqaEV6aI%3D", "location": "pages/2.png"}
         content  [1] content | tool call download -> {"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-ePZqID7Z7MhgAO1NxbD0F2pL.png?st=2024-03-25T15%3A35%3A53Z&se=2024-03-25T17%3A35%3A53Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A32%3A08Z&ske=2024-03-25T21%3A32%3A08Z&sks=b&skv=2021-08-06&sig=UOMHea8ES0VPM9Pqpem7Th/Zh9YUpsPG7muaoi97IgA%3D", "location": "pages/3.png"}
         content  [1] content | tool call download -> {"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-1S8By9i5QwNQ2A32EZQqxfhx.png?st=2024-03-25T15%3A35%3A47Z&se=2024-03-25T17%3A35%3A47Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A15%3A26Z&ske=2024-03-25T21%3A15%3A26Z&sks=b&skv=2021-08-06&sig=3v4unrL0EU9Z5gJMDqLoodMyUCztZcZMG3ZlJgmxHAE%3D", "location": "pages/4.png"}
         content  [1] content | tool call download -> {"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-XUaZNXFjRwjS3g3LtabXgFLM.png?st=2024-03-25T15%3A35%3A46Z&se=2024-03-25T17%3A35%3A46Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A36%3A19Z&ske=2024-03-25T21%3A36%3A19Z&sks=b&skv=2021-08-06&sig=Wr7GHXd5Rkf68CHL6k07KG3fjnW6w8rRP0sHl2jvokk%3D", "location": "pages/5.png"}
09:37:28 started  [sys.download(14)] [input={"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-RZDadFyMveMoMd2V6n684qhV.png?st=2024-03-25T15%3A35%3A46Z&se=2024-03-25T17%3A35%3A46Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A15%3A24Z&ske=2024-03-25T21%3A15%3A24Z&sks=b&skv=2021-08-06&sig=Vk6dvDnQfElAYQZu8UWTYvj0F3w1toRrdq%2BNKt%2BhEX4%3D", "location": "pages/1.png"}]
09:37:28 started  [sys.download(15)] [input={"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-XUaZNXFjRwjS3g3LtabXgFLM.png?st=2024-03-25T15%3A35%3A46Z&se=2024-03-25T17%3A35%3A46Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A36%3A19Z&ske=2024-03-25T21%3A36%3A19Z&sks=b&skv=2021-08-06&sig=Wr7GHXd5Rkf68CHL6k07KG3fjnW6w8rRP0sHl2jvokk%3D", "location": "pages/5.png"}]
09:37:28 started  [sys.download(16)] [input={"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-1S8By9i5QwNQ2A32EZQqxfhx.png?st=2024-03-25T15%3A35%3A47Z&se=2024-03-25T17%3A35%3A47Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A15%3A26Z&ske=2024-03-25T21%3A15%3A26Z&sks=b&skv=2021-08-06&sig=3v4unrL0EU9Z5gJMDqLoodMyUCztZcZMG3ZlJgmxHAE%3D", "location": "pages/4.png"}]
09:37:28 started  [sys.download(17)] [input={"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-PaDOV3QCaWXAx9o2CcRrD6nt.png?st=2024-03-25T15%3A35%3A49Z&se=2024-03-25T17%3A35%3A49Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A28%3A50Z&ske=2024-03-25T21%3A28%3A50Z&sks=b&skv=2021-08-06&sig=scg8q2Eici0j7Vj4sqy5xVe4spi2eDPI0k8LqaEV6aI%3D", "location": "pages/2.png"}]
09:37:28 started  [sys.download(18)] [input={"url": "https://oaidalleapiprodscus.blob.core.windows.net/private/org-UZ21HIS1j93qUiZVWBOGePHu/user-nfhF7kaasrYgX69n1He52KF9/img-ePZqID7Z7MhgAO1NxbD0F2pL.png?st=2024-03-25T15%3A35%3A53Z&se=2024-03-25T17%3A35%3A53Z&sp=r&sv=2021-08-06&sr=b&rscd=inline&rsct=image/png&skoid=6aaadede-4fb3-4698-a8f6-684d7786b067&sktid=a48cca56-e6da-484e-a814-9c849652bcb3&skt=2024-03-24T21%3A32%3A08Z&ske=2024-03-25T21%3A32%3A08Z&sks=b&skv=2021-08-06&sig=UOMHea8ES0VPM9Pqpem7Th/Zh9YUpsPG7muaoi97IgA%3D", "location": "pages/3.png"}]
09:37:28 sent     [sys.download(17)]
09:37:28 sent     [sys.download(18)]
09:37:28 failed to run tool [sys.download] cmd [sys.download]: exec: "sys.download": executable file not found in $PATH
09:37:28 sent     [sys.download(15)]
09:37:28 sent     [sys.download(14)]
09:37:28 sent     [sys.download(16)]
09:37:28 failed to run tool [sys.download] cmd [sys.download]: exec: "sys.download": executable file not found in $PATH
09:37:28 failed to run tool [sys.download] cmd [sys.download]: exec: "sys.download": executable file not found in $PATH
09:37:28 failed to run tool [sys.download] cmd [sys.download]: exec: "sys.download": executable file not found in $PATH
09:37:28 failed to run tool [sys.download] cmd [sys.download]: exec: "sys.download": executable file not found in $PATH
2024/03/25 09:37:28 ERROR: : exec: "sys.download": executable file not found in $PATH

[sangee2004]

Tested with gptscript version v0.0.0-dev-eb5e2646-dirty

Able to execute the script successfully using the script that was generated from --assemble of story-book.gpt