ss.request_acquire(show_ui=True, modal_ui=False)

[Dhruv00710]

def test_multiple_images_scan(root_window):
logging.basicConfig(level=logging.DEBUG)
with twain.SourceManager(root_window) as sm:
with sm.open_source() as ss:
for _ in range(2):
ss.request_acquire(show_ui=False, modal_ui=False)
rv = ss.xfer_image_natively()
if rv:
(handle, count) = rv
print(f"number of images remaining: {count}")
twain.dib_to_bm_file(handle, 'testscans/{}.bmp'.format(uuid.uuid4()))
else:
break
ss.hide_ui()
sir using above code when ss.request_acquire(show_ui=True, modal_ui=False) or ss.request_acquire(show_ui=True, modal_ui=True) in both situation. its give error like
INFO:main:Creating source manager
INFO:lowlevel:attempting to load dll: C:\Windows\twain_32.dll
INFO:lowlevel:DSM initialized
INFO:main:Opening source
INFO:lowlevel:starting source selection dialog
INFO:lowlevel:user selected source with id 827
INFO:lowlevel:opening data source with id 827
INFO:main:Request acquire
INFO:lowlevel:starting scan
INFO:main:Transferring image
INFO:lowlevel:closing data source with id 827
ERROR:main:Error: module 'twain.exceptions' has no attribute 'DSTransferCancelled'

[denisenkom]

Can you provide full stack trace?

[Dhruv00710]

import sys
import os
import logging
import twain
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QTextEdit, QVBoxLayout, QWidget, QLabel

class ScannerApp(QMainWindow):
def init(self):
super().init()

    self.setWindowTitle('Scanner App')
    self.setGeometry(100, 100, 400, 300)

    self.central_widget = QWidget(self)
    self.setCentralWidget(self.central_widget)

    self.layout = QVBoxLayout(self.central_widget)

    self.scan_button = QPushButton('Scan', self)
    self.scan_button.clicked.connect(self.scan)
    self.layout.addWidget(self.scan_button)

    self.log_label = QLabel('Log:')
    self.layout.addWidget(self.log_label)

    self.log_text = QTextEdit(self)
    self.layout.addWidget(self.log_text)

    self.logger = logging.getLogger(__name__)
    logging.basicConfig(level=logging.INFO)

def scan(self):
    parent_window_handle = int(self.winId())
    self.logger.info('Creating source manager')
    
    try:
        with twain.SourceManager(parent_window_handle) as sm:
            self.logger.info('Opening source')
            ss = sm.open_source()
            if not ss:
                self.logger.error('Failed to open a scanner source')
                return None
            self.logger.info('Request acquire')
            ss.request_acquire(show_ui=True, modal_ui=True)
            handles = []
            more = 1
            try:
                self.logger.info('Transferring image')
                handle, more = ss.xfer_image_natively()
                handles.append(handle)
            except twain.exceptions.DSTransferCancelled:
                self.logger.info('Cancelled')
                pass
            while more != 0:
                try:
                    self.logger.info('Transferring image')
                    handle, more = ss.xfer_image_natively()
                    handles.append(handle)
                except twain.exceptions.DSTransferCancelled:
                    self.logger.info('Cancelled')
                    more = 0
            self.logger.info('Transfer complete')
            index = 0
            curr_folder = os.path.dirname(__file__)  # Use __file__ to get the current script's directory
            for handle in handles:
                twain.dib_to_bm_file(handle, os.path.join(curr_folder, "testscans/{}.bmp".format(index)))
                twain.global_handle_free(handle)
                index += 1
                self.logger.info('Saved image {}'.format(index))
    except Exception as e:
        self.logger.error(f'Error: {str(e)}')

if name == 'main':
app = QApplication(sys.argv)
window = ScannerApp()
window.show()
sys.exit(app.exec_())

[Dhruv00710]

stack trace is below:

Traceback (most recent call last):
File "e:\GKIQ-2023\Student Entry\pytwain-master\1.py", line 42, in scan
rv = ss.xfer_image_natively()
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain_init_.py", line 593, in xfer_image_natively
rv, handle = self.get_native_image()
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain_init.py", line 516, in _get_native_image
rv = self.call(DG_IMAGE,
^^^^^^^^^^^^^^^^^^^^
File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain_init.py", line 175, in _call
return self._sm._call(self.id, dg, dat, msg, buf, expected_returns)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain_init.py", line 968, in _call
raise exc
twain.exceptions.excTWCC_SEQERROR

[denisenkom]

Looks like you are using old version, try upgrading to the latest version 2.2.1

[Dhruv00710]

i upgrade my twain version but also get error

NFO:twain:attempting to load dll: C:\Windows\twain_32.dll
INFO:twain:DSM initialized
INFO:twain:starting source selection dialog
INFO:twain:user selected source with id 904
INFO:twain:opening data source with id 904
INFO:twain:starting scan
INFO:twain:closing data source with id 904
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\tkinter\__init__.py", line 1948, in __call__
    return self.func(*args)
           ^^^^^^^^^^^^^^^^
  File "e:\GKIQ-2023\Student Entry\pytwain-master\tests\2.py", line 13, in button_click
    rv = ss.xfer_image_natively()
         ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain\__init__.py", line 597, in xfer_image_natively
    rv, handle = self._get_native_image()
                 ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain\__init__.py", line 520, in _get_native_image
    rv = self._call(DG_IMAGE,
         ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain\__init__.py", line 179, in _call
    return self._sm._call(self._id, dg, dat, msg, buf, expected_returns)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\DELL\AppData\Local\Programs\Python\Python311-32\Lib\site-packages\twain\__init__.py", line 973, in _call
    raise exc
twain.exceptions.SequenceError

and my code is

import tkinter as tk
import twain
import uuid
import logging
app = tk.Tk()
app.title("Simple Form")
def button_click():
    logging.basicConfig(level=logging.DEBUG)
    with twain.SourceManager(app) as sm:
        with sm.open_source() as ss:
            for _ in range(2):
                ss.request_acquire(show_ui=True, modal_ui=True)
                rv = ss.xfer_image_natively()
                if rv:
                    (handle, count) = rv
                    print(f"number of images remaining: {count}")
                    twain.dib_to_bm_file(handle, 'testscans/{}.bmp'.format(uuid.uuid4()))
                else:
                    break
                ss.hide_ui()
button = tk.Button(app, text="Click Me", command=button_click)
button.pack()

app.mainloop()

[Dhruv00710]

sir please solve my query.

…

On Tue, Oct 17, 2023 at 3:20 AM denisenkom ***@***.***> wrote: Looks like you are using old version, try upgrading to the latest version 2.2.1 — Reply to this email directly, view it on GitHub <#38 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ARCUBTGMXMQLZOBJWJSDZWLX7WTY7AVCNFSM6AAAAAA6AZ4EEWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTONRVGMZTEMJUHE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[denisenkom]

I tried running this program, and it worked for me. So I could not reproduce your issue.

[Dhruv00710]

sir can you solve my query. i give you anydesk. because i tried but not success. so please i request to you.

[denisenkom]

Try enabling debug logging for twain DSM using environment variable TWAINDSM_LOG, e.g. do:

set TWAINDSM_LOG=c:/temp/twainlog.txt

Before you start your program, and then run your program from the same terminal window.

Logging only works with Twain DSM (can be downloaded here https://github.com/twain/twain-dsm/releases). Logging does not work with twain_32 which is bundled with Windows. You would need to pass path to DSM via dsm_name paramter in SourceManager constructor.

[denisenkom]

Were you able to get logs with the above mechanism?

[Dhruv00710]

yes sir

[denisenkom]

Can you share logs here? Or have you already figured out your issue?

[Dhruv00710]

SORRY SIR. BECAUSE AT THAT TIME I DON'T UNDERSTAND WHAT IS LOGS WITH MECHANISM. SO I REPLAY WITH YES.

ONCE AGAIN SORRY SIR.