I have a DTML object that calls an external method which returns an image. It works correctly for some images, but not for others. I am using Zope 2.5.0, python2.1.3 on Linux 2.4.18. I get the following traceback when it doesn't work: Zope Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: argument 2 must be string or read-only buffer, not ImplicitAcquirerWrapper Troubleshooting Suggestions * The URL may be incorrect. * The parameters passed to this resource may be incorrect. * A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. Powered by Zope Traceback (innermost last): File ZPublisher/Publish.py, line 150, in publish_module File ZPublisher/Publish.py, line 114, in publish File Zope/__init__.py, line 158, in zpublisher_exception_hook (Object: FAS) File ZPublisher/Publish.py, line 98, in publish File ZPublisher/mapply.py, line 88, in mapply (Object: makeimage) File ZPublisher/Publish.py, line 39, in call_object (Object: makeimage) File Products/ExternalMethod/ExternalMethod.py, line 202, in __call__ (Object: makeimage) (Info: ((<Folder instance at 8915fb0>, <h3>form</h3><table><tr valign="top" align="left"><th>original_id</th><td>'FAS001908_png'</td></tr><tr valign="top" align="left"><th>percentage</th><td>'25'</td></tr><tr valign="top" align="left"><th>rotation</th><td>'90'</td></tr></table><h3>cookies</h3><table><tr valign="top" align="left"><th>tree-s</th><td>'eJyLjlZ3hANPW/XYWAAtiQTP'</td></tr></table><h3>lazy items</h3><table><tr valign="top" align="left"><th>SESSION</th><td><Python Method object at 0x8279378></td></tr></table><h3>other</h3><table><tr valign="top" align="left"><th>AUTHENTICATION_PATH</th><td>''</td></tr><tr valign="top" align="left"><th>percentage</th><td>'25'</td></tr><tr valign="top" align="l eft"><th>rotation</th><td>'90'</td></tr><tr valign="top" align="left"><th>PUBLISHED</th><td><ExternalMethod instance at 888c430></td></tr><tr valign="top" align="left"><th>original_id</th><td>'FAS001908_png'</td></tr><tr valign="top" align="left"><th>URL0</th><td>'http://localhost:8080/InsuranceLiquidators/FAS/makeimage'</td></tr><tr valign="top" align="left"><th>BASE3</th><td>'http://localhost:8080/InsuranceLiquidators/FAS'</td></tr><tr valign="top" align="left"><th>URL2</th><td>'http://localhost:8080/InsuranceLiquidators'</td></tr><tr valign="top" align="left"><th>BASE1</th><td>'http://localhost:8080'</td></tr><tr valign="top" align="left"><th>BASE0</th><td>'http://localhost:8080'</td></tr><tr valign="top" align="left"><th>URL1</th><td>'http://localhost:8080/InsuranceLiquidators/FAS'</td></tr><tr valign="top" align="left"><th>SERVER_URL</th><td>'http://localhost:8080'</td></tr><tr valign="top" align="left"><th>tree-s</th><td>'eJyLjlZ3hANPW/XYWAAtiQTP'</td></tr><tr valign="top" align="left"><th>URL</th><td>'http://localhost:8080/InsuranceLiquidators/FAS/makeimage'</td></tr><tr valign="top" align="left"><th>AUTHENTICATED_USER</th><td>admin</td></tr><tr valign="top" align="left"><th>URL3</th><td>'http://localhost:8080'</td></tr><tr valign="top" align="left"><th>TraversalRequestNameStack</th><td>[]</td></tr><tr valign="top" align="left"><th>BASE2</th><td>'http://localhost:8080/InsuranceLiquidators'</td></tr><tr valign="top" align="left"><th>BASE4</th><td>'http://localhost:8080/InsuranceLiquidators/FAS/makeimage'</td></tr><tr valign="top" align="left"><th>URL0</th><td>http://localhost:8080/InsuranceLiquidators/FAS/makeimage</td></tr><tr valign="top" align="left"><th>URL1</th><td>http://localhost:8080/InsuranceLiquidators/FAS</t d></tr><tr valign="top" align="left"><th>URL2</th><td>http://localhost:8080/InsuranceLiquidators</td></tr><tr valign="top" align="left"><th>URL3</th><td>http://localhost:8080</td></tr><tr valign="top" align="left"><th>BASE0</th><td>http://localhost:8080</td></tr><tr valign="top" align="left"><th>BASE1</th><td>http://localhost:8080</td></tr><tr valign="top" align="left"><th>BASE2</th><td>http://localhost:8080/InsuranceLiquidators</td></tr><tr valign="top" align="left"><th>BASE3</th><td>http://localhost:8080/InsuranceLiquidators/FAS</td></tr><tr valign="top" align="left"><th>BASE4</th><td>http://localhost:8080/InsuranceLiquidators/FAS/makeimage</td></tr></table><h3>environ</h3><table><tr valign="top" align="left"><th>SCRIPT_NAME</th><td>''</td></tr><tr valign="top" align="left"><th>HTTP_ACCEPT_ENCODING</th><td>'gzip, deflate, compress;q=0.9'</td></tr><tr valign="top" align="left"><th>SERVER_PORT</th><td>'8080'</td></tr><tr valign="top" align="left"><th>PATH_TRANSLATED</th><td>'/InsuranceLiquidators/FAS/makeimage'</td></tr><tr valign="top" align="left"><th>HTTP_ACCEPT</th><td>'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,text/css,*/*;q=0.1'</td></tr><tr valign="top" align="left"><th>GATEWAY_INTERFACE</th><td>'CGI/1.1'</td></tr><tr valign="top" align="left"><th>HTTP_ACCEPT_LANGUAGE</th><td>'en-us, en;q=0.50'</td></tr><tr valign="top" align="left"><th>REMOTE_ADDR</th><td>'127.0.0.1'</td></tr><tr valign="top" align="left"><th>SERVER_NAME</th><td>'vorpal.macdev.com'</td></tr><tr valign="top" align="left"><th>HTTP_USER_AGENT</th><td>'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020313'</td></tr><tr valign="top" align="left"><th>HTTP_ACCEPT_CHA RSET</th><td>'ISO-8859-1, utf-8;q=0.66, *;q=0.66'</td></tr><tr valign="top" align="left"><th>CONNECTION_TYPE</th><td>'keep-alive'</td></tr><tr valign="top" align="left"><th>channel.creation_time</th><td>1018477697</td></tr><tr valign="top" align="left"><th>QUERY_STRING</th><td>'original_id=FAS001908_png&percentage=25&rotation=90'</td></tr><tr valign="top" align="left"><th>SERVER_PROTOCOL</th><td>'HTTP/1.1'</td></tr><tr valign="top" align="left"><th>HTTP_KEEP_ALIVE</th><td>'300'</td></tr><tr valign="top" align="left"><th>HTTP_HOST</th><td>'localhost:8080'</td></tr><tr valign="top" align="left"><th>REQUEST_METHOD</th><td>'GET'</td></tr><tr valign="top" align="left"><th>PATH_INFO</th><td>'/InsuranceLiquidators/FAS/makeimage'</td></tr><tr valign="top" align="left"><th>SERVER_SOFTWARE</th><td>'Zope/(Zope 2.5.0 (source release, python 2.1, linux2), python 2.1.3, linux2) ZServer/1.1b1'</td></tr><tr valign="top" align="left"><th>HTTP_COOKIE</th><td>'tree-s="eJyLjlZ3hANPW/XYWAAtiQTP"'</td></tr><tr valign="top" align="left"><th>HTTP_REFERER</th><td>'http://localhost:8080/InsuranceLiquidators/FAS/DisplayImage?original_id=FAS001908_png&percentage=25&rotation=90'</td></tr></table>, ZServerHTTPResponse('')), {}, None)) File /usr/local/src/Zope-2.5.0-src/Extensions/makeimage.py, line 20, in makeimage (Object: FAS) TypeError: (see above) The DTML DisplayImage source is: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <TITLE>Image</TITLE> </HEAD> <!-- Background white, links blue (unvisited), navy (visited), red (active) --> <BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#0000FF" ALINK="#FF0000"

<form action="processimagecontrols"> <input type="hidden" name="original_id" value="<dtml-var original_id>"> <input type="hidden" name="rotation" value="<dtml-var rotation>"> <input type="image" name="prev" value="prev" SRC="Icons/left-arrow_png"> <input type="image" name="left" value="left" SRC="Icons/button_undo_png"> <input type="image" name="zoom" value="zoom" SRC="Icons/button_replace_png"> <input type="text" name="percentage" size="3" maxlength="3" value="<dtml-var percentage>"> <input type="image" name="right" value="right" SRC="Icons/button_redo_png"> <input type="image" name="next" value="right" SRC="Icons/right-arrow_png"> <dtml-var original_id> rotation <dtml-var rotation> </form> <script language="JavaScript"> Sheight = window.innerHeight - 50; Swidth = window.innerWidth; document.write('<iframe scrolling=yes src="makeimage?original_id=<dtml-var original_id>&percentage=<dtml-var percentage>&rotation=<dtml-var rotation>" name="Image Frame" height="' + Sheight + '" width="' + Swidth + '">'); </script> <!-- <iframe scrolling=yes src="makeimage?original_id=<dtml-var original_id>&percentage=<dtml-var percentage>&rotation=<dtml-var rotation>" name="Image Frame" height="600">" width="640">"> --> </iframe> </HTML> The makeimage.py source is: def makeimage(self, REQUEST, RESPONSE): """ Resizes and rotates the image given by original_id when in the Images folder based on percentage and rotation. The new image will be returned as a mime object. """ import _PyMagick original_id = REQUEST['original_id'] percentage = long(REQUEST['percentage']) rotation = long(REQUEST['rotation']) # Get the original image data Stuff=self.ZopeFind(self.Images,obj_metatypes=['Image'],obj_ids=[original_id]) if len(Stuff)==0:return iobject=Stuff[0][1] img = _PyMagick.getzimage(original_id,iobject.data,len(iobject.data)) if percentage>100:percentage=100 if percentage!=100: factor = percentage/100. nrows=long(img.rows*factor) ncols=long(img.columns*factor) sw = img.Resize(nrows,ncols,0,1.0) else:sw=img if rotation!=0:ri=sw.Rotate(float(rotation)) else:ri=sw x = ri.ImageToBlob() RESPONSE.setHeader('Content-Type','image/png') RESPONSE.setHeader('Content-Length',len(x)) del(img) del(sw) return x If anyone has any suggestions, I'd appreciate them. Thanks, Dave