Content transformation application/pdf to image/jpeg Unsuported

[neo6200]

When i try to call trasnformation WebScript

alfresco/service/api/node/workspace/SpacesStore/a605a433-ae1f-4fb1-9e3d-42128ae3cee7/content/thumbnails/imgpreview?c=force&ph=true

And the content is a scanned pdf file uploaded to Alfresco 4.2.f

I get this error

org.alfresco.repo.content.transform.UnsupportedTransformationException - 0719122082 Unsupported transformation: transformer.ImageMagick application/pdf to image/jpeg org.alfresco.repo.content.transform.AbstractContentTransformer2.checkTransformable(AbstractContentTransformer2.java:140)org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:205)org.alfresco.repo.content.transform.FailoverContentTransformer.transformInternal(FailoverContentTransformer.java:201)org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:211)org.alfresco.repo.content.ContentServiceImpl.failoverTransformers(ContentServiceImpl.java:679)org.alfresco.repo.content.ContentServiceImpl.transform(ContentServiceImpl.java:628)sun.reflect.GeneratedMethodAccessor3186.invoke(Unknown Source)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)java.lang.reflect.Method.invoke(Method.java:606)org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)net.sf.acegisecurity.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:80)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)org.alfresco.repo.model.ml.MLContentInterceptor.invoke(MLContentInterceptor.java:125)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:46)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:161)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)com.sun.proxy.$Proxy81.transform(Unknown Source)org.alfresco.repo.rendition.executer.AbstractTransformationRenderingEngine$TransformationCallable$1.doWork(AbstractTransformationRenderingEngine.java:435)org.alfresco.repo.rendition.executer.AbstractTransformationRenderingEngine$TransformationCallable$1.doWork(AbstractTransformationRenderingEngine.java:426)org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:548)org.alfresco.repo.rendition.executer.AbstractTransformationRenderingEngine$TransformationCallable.call(AbstractTransformationRenderingEngine.java:425)org.alfresco.repo.rendition.executer.AbstractTransformationRenderingEngine$TransformationCallable.call(AbstractTransformationRenderingEngine.java:403)java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)java.util.concurrent.FutureTask.run(FutureTask.java:166)java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)java.lang.Thread.run(Thread.java:724)‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

¿Can anyone give me a hint to solve this?

[mitpatoliya]

Webscript you are calling is preview webscript and nodeRef is of pdf file.
Alfresco is trying to convert that pdf to image and that is the cause of issue.
Are you able to preveiw this pdf file in alfresco share?