`TooManyPagesException` when change the `fit` parameter in `Image` "widget"

[MacDeveloper1]

I have a code which inserts an image with resulution 1875x1058. (But actually the resolution does not affect the output)

Image(
  MemoryImage(_image),
  fit: BoxFit.contain,
  alignment: Alignment.topCenter,
  width: pageFormat.availableWidth,
  height: pageFormat.availableHeight,
),

It prints too small for the page with margins 1cm from any side. So I tried to make the image fit the the availableWidth, i.e.

Image(
  MemoryImage(_image),
  fit: BoxFit.fitWidth,
  alignment: Alignment.topCenter,
  width: pageFormat.availableWidth,
  height: pageFormat.availableHeight,
),

But I got the error. Moreover any value which is different from BoxFix.contains generate the same exception TooManyPagesException. Why is it? What does it mean? And how make image really fit the available space?

══╡ EXCEPTION CAUGHT BY PRINTING ╞══════════════════════════════════════════════════════════════════
The following TooManyPagesException was thrown while generating a PDF:
Instance of 'TooManyPagesException'
When the exception was thrown, this was the stack:
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 294:3  throw_
packages/pdf/src/widgets/multi_page.dart 251:9                               generate
packages/pdf/src/widgets/document.dart 117:9                                 addPage
packages/cemacs/framework/services/pdf_builder.dart 104:7                    build
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 45:50           <fn>
dart-sdk/lib/async/zone.dart 1661:54                                         runUnary
dart-sdk/lib/async/future_impl.dart 162:18                                   handleValue
dart-sdk/lib/async/future_impl.dart 846:44                                   handleValueCallback
dart-sdk/lib/async/future_impl.dart 875:13                                   _propagateToListeners
dart-sdk/lib/async/future_impl.dart 647:5                                    [_completeWithValue]
dart-sdk/lib/async/future_impl.dart 721:7                                    callback
dart-sdk/lib/async/schedule_microtask.dart 40:11                             _microtaskLoop
dart-sdk/lib/async/schedule_microtask.dart 49:5                              _startMicrotaskLoop
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 181:7           <fn>
PageFormat: "PdfPageFormat 612x792 margins:72, 72, 72, 72"
════════════════════════════════════════════════════════════════════════════════════════════════════

[bksbora]

const double inch = 72.0;
    const double cm = inch / 2.54;
    Image(
  MemoryImage(_image),
  alignment: Alignment.topCenter,
  width: 15.0 * cm,
  height: 20.0 * cm,
),
    ```
    Also you may try to put into a container and give height and width to it.

[bambinoua]

@bksbora thank you for your answer but the question was why fit parameter is not working and cause an exception. Moreover I don't understand how your code helps? My code is the same and I need image tp occupy the whole page and not only 15x20 cm. That is why I specified availableWidth and availableHeight.

[bksbora]

Please let us know when you solve :) Hope you best !