An error occurred while executing a save: Expression evaluation error: Invalid index: Cannot index property 'medicalScientist' of type String into type List of Variant

Question

Hi all, 
 
 A n error occurred while executing a save: Expression evaluation error: Invalid index: Cannot index property 'medicalScientist' of type String into type List of Variant. 
 I got the above error for this code can any one help me out on this

a!localVariables(
 local!availableCollabsAmdsPagingInfo: a!pagingInfo(
 startIndex: 1,
 batchSize: cons!ISR_INT_BATCH_SIZE_EXTRA_LARGE
 ),
 local!selectedCollabsAmdsPagingInfo: a!pagingInfo(
 startIndex: 1,
 batchSize: cons!ISR_INT_BATCH_SIZE_EXTRA_LARGE
 ),
 local!userTimeZOne: rule!CMN_er_populateUserTimeZone(user: loggedInUser()),
 local!availableCollabsAmdsDataSubset: rule!ISR_er_FetchISRAndCollabsAmendmentsDataForIRCGRCMeeting(
 therapeuticAreaIds: ri!therapeuticAreaIds,
 pagingInfo: local!availableCollabsAmdsPagingInfo,
 researchType: cons!ISR_TXT_GRC_RESEARCH_TYPE_LIST
 ),
 local!collabsAmdSelection: ri!selectedCollabsAmds,
 local!collabsAmdSelectedRows: a!refreshVariable(
 value: ri!collabsAmdSelectedRows,
 refreshOnVarChange: ri!buttonActionMeetingTypeChange
 ), 
 local!collabsAmdMedicalScientists,
 local!selectedCollabsAmdsDataSubset: a!dataSubset(
 startIndex: index(local!selectedCollabsAmdsPagingInfo, "startIndex", 1),
 batchSize: index(local!selectedCollabsAmdsPagingInfo, "batchSize", -1),
 sort: index(local!selectedCollabsAmdsPagingInfo, "sort", {}),
 totalCount: count(index(local!collabsAmdSelectedRows, "amdId", {})),
 data: local!collabsAmdSelectedRows,
 identifiers: index(local!collabsAmdSelectedRows, "amdId", {})
 ),
 {
 /*Amendments*/
 a!boxLayout(
 label: "Available Collaborative Amendments",
 contents: {
 a!gridField(
 label: "",
 emptyGridMessage: "No Collaborative Amendments Available",
 data: local!availableCollabsAmdsDataSubset,
 columns: {
 a!gridColumn(
 label: "Amendment Number",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: fv!row.amendmentNumber,
 link: a!recordLink(
 recordType: cons!ISR_RECORD_GS_AMENDMENT,
 identifier: fv!row.amdId
 ),
 linkStyle: "STANDALONE"
 )
 ),
 align: "START",
 width: "1X"
 ),
 a!gridColumn(
 label: "Amendment Reason",
 value: a!localVariables(
 local!Id,
 rule!CMN_c_CompressAndExpandTheParagraphText(
 savedLocalVariable: local!Id,
 identifier: fv!identifier,
 text: fv!row.amendmentReason
 )
 ),
 align: "START",
 width: "2X"
 ),
 a!gridColumn(
 label: "Proposal Number",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: fv!row.proposalNumber,
 link: a!recordLink(
 recordType: cons!ISR_RECORD_GS_APPLICATION,
 identifier: fv!row.proposalId
 ),
 linkStyle: "STANDALONE"
 )
 ),
 align: "START",
 width: "2X"
 ),
 a!gridColumn(
 label: "Principal Investigator",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: fv!row.primaryResearcher
 )
 ),
 align: "START",
 width: "2X"
 ),
 a!gridColumn(
 label: "Study Title",
 value: a!localVariables(
 local!Id,
 rule!CMN_c_CompressAndExpandTheParagraphText(
 savedLocalVariable: local!Id,
 identifier: fv!identifier,
 text: fv!row.studyTitle,
 textCompressLength: cons!ISR_TEXT_COMPRESS_LENGTH
 )
 ),
 align: "START",
 width: "2X"
 ),
 /*a!gridColumn(*/
 /*label: "Currency Code",*/
 /*value: a!richTextDisplayField(*/
 /*value: a!richTextItem(text: fv!row.currencyCode)*/
 /*),*/
 /*align: "START"*/
 /*width:"2X"*/
/**/
 /*),*/
 a!gridColumn(
 label: "Amendment Budget",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: 
 if(rule!APN_isBlank( fv!row.convertedIncrementalBudget),
 0.00,
 fixed(index(fv!row, "ConvertedIncrementalBudget", ""), 2)
 ))
 ),
 helpTooltip: "Additional Requested Budget",
 align: "END"

 ),
 a!gridColumn(
 label: "Country",
 value: a!imageField(
 images: a!documentImage(
 document: rule!APN_getIsoCountryFlag(countryCode: fv!row.countryCode),
 caption: fv!row.countryName
 )
 ),
 width: "1X",
 align: "CENTER"
 ),
 a!gridColumn(
 label: "Therapeutic Area",
 value: a!localVariables(
 local!Id,
 rule!CMN_c_CompressAndExpandTheParagraphText(
 savedLocalVariable: local!Id,
 identifier: fv!identifier,
 text: fv!row.therapeuticArea
 )
 ),
 align: "START",
 width: "2X"
 ),
 a!gridColumn(
 label: "Medical Scientist / Project Champion",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: rule!APN_displayUser(fv!row.medicalScientist)
 ),
 showWhen: not(rule!APN_isBlank(fv!row.medicalScientist)),
 ),
 align: "START",
 width: "2X"
 ),
 a!gridColumn(
 label: "Slides",
 value: a!imageField(
 images: a!documentImage(
 document: cons!ISR_ICON_PRESENTATION,
 altText: "Slide",
 caption: concat(
 "Click here to download",
 " ",
 document(fv!row.mastSlideDocId, "name")
 ),
 link: a!documentDownloadLink(document: fv!row.mastSlideDocId)
 ),
 align: "CENTER",
 showWhen: not(
 rule!APN_isBlank(fv!row.mastSlideDocId)
 )
 ),
 align: "CENTER",
 width: "ICON_PLUS"
 ),
 a!gridColumn(
 label: "RC Slide uploaded on",
 value: a!richTextDisplayField(
 value: a!richTextItem(
 text: concat(
 rule!ISR_er_RFPconvertDateTIMEFormat(
 showTimeZone: false(),
 date: index(
 rule!ISR_qry_GetAmendmentStudyByCriteria(amdId: fv!row.amdId),
 "rcSlideUploadedOn",
 {}
 )
 ),
 if(
 rule!APN_isBlank(
 index(
 rule!ISR_qry_GetAmendmentStudyByCriteria(amdId: fv!row.amdId),
 "rcSlideUploadedOn",
 {}
 )
 ),
 {},
 local!userTimeZOne
 ),

 ),
 style: "EMPHASIS",
 size: "STANDARD",

 )
 ),
 align: "CENTER",
 width: "2X"
 ),
 },
 pagingSaveInto: local!availableCollabsAmdsPagingInfo,
 selectable: true(),
 selectionStyle: "CHECKBOX",
 selectionValue: local!collabsAmdSelection,
 selectionSaveInto: {
 local!collabsAmdSelection,
 a!save(ri!selectedCollabsAmds, local!collabsAmdSelection),
 a!save(
 local!collabsAmdSelectedRows,
 append(local!collabsAmdSelectedRows, fv!selectedRows)
 ),
 a!save(
 local!collabsAmdSelectedRows,
 remove(
 local!collabsAmdSelectedRows,
 wherecontains(
 tointeger(index(fv!deselectedRows, "amdId", {})),
 tointeger(
 index(local!collabsAmdSelectedRows, "amdId", {})
 )
 )
 )
 ),
 /*a!save(*/
 /*local!collabsAmdSelectedRows,*/
 /*difference(*/
 /*local!collabsAmdSelectedRows,*/
 /*fv!deselectedRows*/
 /*)*/
 /*),*/
 a!save(ri!collabsAmdSelectedRows,local!collabsAmdSelectedRows),
 /*Populating Medical Scientists*/
 a!save(
 local!collabsAmdMedicalScientists,
 local!collabsAmdSelectedRows.medicalScientist
 ),
 a!save(
 ri!collabsAmdMedicalScientists,
 remove(
 local!collabsAmdMedicalScientists,
 wherecontains(
 null,
 touniformstring(local!collabsAmdMedicalScientists)
 )
 )
 )
 },
 spacing: "DENSE"
 )
 },
 style: cons!CMN_COLOR_GILEAD_RED,
 marginBelow: "STANDARD",
 showWhen: not(
 rule!APN_isBlank(ri!therapeuticAreaIds)
 )
 ),
 a!richTextDisplayField(
 labelPosition: "COLLAPSED",
 value: {
 a!richTextIcon(
 icon: "refresh",
 caption: "Refresh Medical Scientist",
 link: a!dynamicLink(
 saveInto: {
 a!save(
 local!availableCollabsAmdsDataSubset,
 rule!ISR_er_FetchISRAndCollabsAmendmentsDataForIRCGRCMeeting(
 therapeuticAreaIds: ri!therapeuticAreaIds,
 pagingInfo: local!availableCollabsAmdsPagingInfo,
 researchType: cons!ISR_TXT_GRC_RESEARCH_TYPE_LIST
 )
 ),
 a!save(
 local!collabsAmdSelectedRows,
 index(
 index(
 local!availableCollabsAmdsDataSubset,
 "data",
 {}
 ),
 wherecontains(
 tointeger(local!collabsAmdSelection),
 tointeger(
 index(
 index(
 local!availableCollabsAmdsDataSubset,
 "data",
 {}
 ),
 "amdId",
 {}
 )
 )
 ),
 {}
 )
 ),
 a!save(
 local!collabsAmdMedicalScientists,
 local!collabsAmdSelectedRows.medicalScientist
 ),
 a!save(
 ri!collabsAmdMedicalScientists,
 remove(
 local!collabsAmdMedicalScientists,
 wherecontains(
 null,
 touniformstring(local!collabsAmdMedicalScientists)
 )
 )
 )
 }
 ),
 size: "LARGE"
 )
 },
 align: "RIGHT",
 showWhen: not(
 rule!APN_isEmpty(local!collabsAmdSelectedRows)
 )
 ),
 a!boxLayout(
 label: "Selected Collaborative Amendments",
 style: cons!CMN_COLOR_GILEAD_RED,
 marginBelow: "STANDARD",
 contents: {
 rule!ISR_g_SelectedAmds(
 data: local!selectedCollabsAmdsDataSubset,
 pagingInfo: local!selectedCollabsAmdsPagingInfo,
 isShowOnDashboard: false(),
 selectedAmdId: ri!selectedAmdId,
 amdPrimaryReviewer: ri!amdPrimaryReviewer,
 amdAdhocReviewer: ri!amdAdhocReviewer,
 showAmdHelpText: ri!showAmdHelpText,
 readOnly: False()
 )
 },
 showWhen: not(
 rule!APN_isBlank(local!collabsAmdSelectedRows)
 )
 )
 }
)